diff --git a/build/guppy.js b/build/guppy.js
index 86c30a5b..50f5fe99 100644
--- a/build/guppy.js
+++ b/build/guppy.js
@@ -5277,7 +5277,7 @@ var Guppy = (function () {
     	output: {
     		latex: "\\dfrac{{$1}}{{$2}}",
     		small_latex: "\\frac{{$1}}{{$2}}",
-    		asciimath: "({$1})/({$2})"
+    		asciimath: "{$1}/{$2}"
     	},
     	input: 1,
     	keys: ["/"],
diff --git a/build/guppy.min.js b/build/guppy.min.js
index e56d480f..e4af032e 100644
--- a/build/guppy.min.js
+++ b/build/guppy.min.js
@@ -1 +1 @@
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p(e,t){this.mode=void 0,this.gullet=void 0,this.settings=void 0,this.leftrightDepth=void 0,this.nextToken=void 0,this.mode="math",this.gullet=new yn(e,t,this.mode),this.settings=t,this.leftrightDepth=0}var e=p.prototype;return e.expect=function(e,t){if(void 0===t&&(t=!0),this.nextToken.text!==e)throw new U("Expected '"+e+"', got '"+this.nextToken.text+"'",this.nextToken);t&&this.consume()},e.consume=function(){this.nextToken=this.gullet.expandNextToken()},e.switchMode=function(e){this.mode=e,this.gullet.switchMode(e)},e.parse=function(){this.gullet.beginGroup(),this.settings.colorIsTextColor&&this.gullet.macros.set("\\color","\\textcolor"),this.consume();var e=this.parseExpression(!1);return this.expect("EOF",!1),this.gullet.endGroup(),e},e.parseExpression=function(e,t){for(var r=[];;){"math"===this.mode&&this.consumeSpaces();var n=this.nextToken;if(-1!==p.endOfExpression.indexOf(n.text))break;if(t&&n.text===t)break;if(e&&rn[n.text]&&rn[n.text].infix)break;var 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a={funcName:e,parser:this,token:n,breakOnTokenText:i},o=rn[e];if(o&&o.handler)return o.handler(a,t,r);throw new U("No function handler for "+e)},e.parseArguments=function(e,t){var r=t.numArgs+t.numOptionalArgs;if(0===r)return{args:[],optArgs:[]};for(var n=t.greediness,i=[],a=[],o=0;o<r;o++){var s=t.argTypes&&t.argTypes[o],l=o<t.numOptionalArgs;0<o&&!l&&this.consumeSpaces(),0!==o||l||"math"!==this.mode||this.consumeSpaces();var h=this.nextToken,u=this.parseGroupOfType("argument to '"+e+"'",s,l,n);if(!u){if(l){a.push(null);continue}throw new U("Expected group after '"+e+"'",h)}(l?a:i).push(u)}return{args:i,optArgs:a}},e.parseGroupOfType=function(e,t,r,n){switch(t){case"color":return this.parseColorGroup(r);case"size":return this.parseSizeGroup(r);case"url":return this.parseUrlGroup(r);case"math":case"text":return this.parseGroup(e,r,n,void 0,t);case"raw":var i=this.parseStringGroup("raw",r,!0);if(i)return{type:"raw",mode:"text",string:i.text};throw new U("Expected raw 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n=e[r],i=n.text;"-"===i&&"-"===e[r+1].text&&(r+1<t&&"-"===e[r+2].text?(e.splice(r,3,{type:"textord",mode:"text",loc:d.range(n,e[r+2]),text:"---"}),t-=2):(e.splice(r,2,{type:"textord",mode:"text",loc:d.range(n,e[r+1]),text:"--"}),t-=1)),"'"!==i&&"`"!==i||e[r+1].text!==i||(e.splice(r,2,{type:"textord",mode:"text",loc:d.range(n,e[r+1]),text:i+i}),t-=1)}},e.parseSymbol=function(){var e=this.nextToken,t=e.text;if(/^\\verb[^a-zA-Z]/.test(t)){this.consume();var r=t.slice(5),n="*"===r.charAt(0);if(n&&(r=r.slice(1)),r.length<2||r.charAt(0)!==r.slice(-1))throw new U("\\verb assertion failed --\n                    please report what input caused this bug");return{type:"verb",mode:"text",body:r=r.slice(1,-1),star:n}}if("%"===t)return this.consumeComment(),this.parseSymbol();xn.hasOwnProperty(t[0])&&!G[this.mode][t[0]]&&(this.settings.strict&&"math"===this.mode&&this.settings.reportNonstrict("unicodeTextInMathMode",'Accented Unicode text character "'+t[0]+'" used in math 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r=1,n=1,i=1,a=1,o=e.firstChild;null!=o;o=o.nextSibling)"c"==o.nodeName?(this.add_paths(o,t+"_c"+i),i++):"f"==o.nodeName?(this.add_paths(o,t+"_f"+n),n++):"l"==o.nodeName?(this.add_paths(o,t+"_l"+a),a++):"e"==o.nodeName&&(this.add_paths(o,t+"_e"+r),r++)},x.prototype.add_classes_cursors=function(e){if("e"==e.nodeName){var t,r=e.firstChild.nodeValue,n="",i=S.is_text(e);if(this.sel_status==x.SEL_CURSOR_AT_START&&(t=this.sel_end),this.sel_status==x.SEL_CURSOR_AT_END&&(t=this.sel_start),this.sel_status!=x.SEL_NONE){var a=S.is_small(t.node)?S.SMALL_SEL_CARET:S.SEL_CARET;a=0==r.length&&1<e.parentNode.childElementCount?"\\blue{\\xmlClass{guppy_elt guppy_blank guppy_loc_"+e.getAttribute("path")+"_0}{"+a+"}}":"\\blue{"+a+"}",this.sel_status==x.SEL_CURSOR_AT_END&&(a=a+"\\"+S.SEL_COLOR+"{"),this.sel_status==x.SEL_CURSOR_AT_START&&(a="}"+a)}var o="",s="";if(0==r.length)if(1==e.parentNode.childElementCount)if(this.current==e){var l=this.setting("blank_caret")||(S.is_small(this.current)?S.SMALL_CARET:S.CARET);n="\\red{\\xmlClass{main_cursor guppy_elt guppy_blank guppy_loc_"+e.getAttribute("path")+"_0}{"+l+"}}"}else{var h=this.setting("blank_placeholder")||"[?]";n=this.temp_cursor.node==e?"\\gray{\\xmlClass{guppy_elt guppy_blank guppy_loc_"+e.getAttribute("path")+"_0}{"+h+"}}":"\\blue{\\xmlClass{guppy_elt guppy_blank guppy_loc_"+e.getAttribute("path")+"_0}{"+h+"}}"}else this.temp_cursor.node==e||this.current==e||t&&t.node==e||(n="\\phantom{\\xmlClass{guppy_elt guppy_blank guppy_loc_"+e.getAttribute("path")+"_0}{\\hspace{0pt}}}");for(var u=0;u<r.length+1;u++)e==this.current&&u==this.caret&&(0<r.length||1<e.parentNode.childElementCount)?(o=S.is_small(this.current)?S.SMALL_CARET:S.CARET,o=0==r.length?"\\red{\\xmlClass{main_cursor guppy_elt guppy_blank guppy_loc_"+e.getAttribute("path")+"_0}{"+o+"}}":"\\red{\\xmlClass{main_cursor}{"+o+"}}",this.sel_status==x.SEL_CURSOR_AT_START?o=o+"\\"+S.SEL_COLOR+"{":this.sel_status==x.SEL_CURSOR_AT_END&&(o="}"+o),n+=o):this.sel_status!=x.SEL_NONE&&t.node==e&&u==t.caret?n+=a:this.temp_cursor.node==e&&u==this.temp_cursor.caret&&(0<r.length||1<e.parentNode.childElementCount)&&(s=S.is_small(this.current)?S.TEMP_SMALL_CARET:S.TEMP_CARET,n+=s=0==r.length?"\\gray{\\xmlClass{guppy_elt guppy_blank guppy_loc_"+e.getAttribute("path")+"_0}{"+s+"}}":"\\gray{"+s+"}"),u<r.length&&(n+="\\xmlClass{guppy_elt guppy_loc_"+e.getAttribute("path")+"_"+u+"}{"+r[u]+"}");i&&e==this.current&&(n="\\xmlClass{guppy_text_current}{{"+n+"}}"),e.setAttribute("render",n),e.removeAttribute("path")}else for(var c=e.firstChild;null!=c;c=c.nextSibling)"c"!=c.nodeName&&"l"!=c.nodeName&&"f"!=c.nodeName&&"e"!=c.nodeName||this.add_classes_cursors(c)},x.prototype.remove_cursors_classes=function(e){if("e"==e.nodeName)e.removeAttribute("path"),e.removeAttribute("render"),e.removeAttribute("current"),e.removeAttribute("temp");else for(var t=e.firstChild;null!=t;t=t.nextSibling)1==t.nodeType&&this.remove_cursors_classes(t)},x.prototype.down_from_f=function(){for(var e=this.current.firstChild;null!=e&&"c"!=e.nodeName&&"l"!=e.nodeName;)e=e.nextSibling;if(null!=e){for(;"l"==e.nodeName;)e=e.firstChild;this.current=e.firstChild}},x.prototype.down_from_f_to_blank=function(){for(var e=this.current.firstChild;null!=e&&("c"!=e.nodeName||1!=e.children.length||""!=e.firstChild.firstChild.nodeValue);)e=e.nextSibling;if(null!=e){for(;"l"==e.nodeName;)e=e.firstChild;if("c"!=e.nodeName||"e"!=e.firstChild.nodeName)return void this.problem("dfftb");this.current=e.firstChild}else this.down_from_f()},x.prototype.delete_from_f=function(e){var t=this.current,r=t.parentNode,n=t.previousSibling,i=t.nextSibling,a=e||"",o=this.make_e(n.firstChild.textContent+a+i.firstChild.textContent);this.current=o,this.caret=n.firstChild.textContent.length,r.insertBefore(o,n),r.removeChild(n),r.removeChild(t),r.removeChild(i)},x.prototype.symbol_to_node=function(e,t){return w.symbol_to_node(e,t,this.doc.base)},x.prototype.template_to_node=function(e,t,r,n){return w.symbol_to_node(w.make_template_symbol(e,r,n),t,this.doc.base)},x.prototype.insert_symbol=function(e,t){var r=t?w.make_template_symbol(e,t.name,t):this.symbols[e];if(r.attrs&&this.is_blacklisted(r.attrs.type))return!1;var n,i,a,o={},s="input"in r?r.input:0,l=[],h=null,u=!1;if(0<s)if(s--,this.sel_status!=x.SEL_NONE)l=(a=this.sel_get()).involved,n=this.make_e(a.remnant.firstChild.nodeValue.slice(0,this.sel_start.caret)),i=this.make_e(a.remnant.firstChild.nodeValue.slice(this.sel_start.caret)),o[s]=a.node_list;else if("input"in r)if(0==this.caret&&null!=this.current.previousSibling)o[s]=[this.make_e(""),this.current.previousSibling,this.make_e("")],h=this.current.previousSibling,u=!0;else{var c=this.current.firstChild.nodeValue.substring(0,this.caret),p=128<c.charCodeAt(c.length-1)?c[c.length-1]:c.match(/[0-9.]+$|[a-zA-Z]$/);null!=p&&0<p.length&&(p=p[0],n=this.make_e(this.current.firstChild.nodeValue.slice(0,this.caret-p.length)),i=this.make_e(this.current.firstChild.nodeValue.slice(this.caret)),o[s]=[this.make_e(p)])}u||null!=n&&null!=i||(this.sel_status!=x.SEL_NONE?(l=(a=this.sel_get()).involved,n=this.make_e(a.remnant.firstChild.nodeValue.slice(0,this.sel_start.caret)),i=this.make_e(a.remnant.firstChild.nodeValue.slice(this.sel_start.caret)),o="input"in r&&r.input<0?[]:[a.node_list]):(n=this.make_e(this.current.firstChild.nodeValue.slice(0,this.caret)),i=this.make_e(this.current.firstChild.nodeValue.slice(this.caret)),l=[this.current]));var d=this.symbol_to_node(r,o),m=this.current.parentNode,f=d.f,g=this.current.nextSibling;if(u)m.replaceChild(f,h);else{0==l.length&&this.current.parentNode.removeChild(this.current);for(var v=0;v<l.length;v++)g==l[v]&&(g=g.nextSibling),m.removeChild(l[v]);m.insertBefore(n,g),m.insertBefore(f,g),m.insertBefore(i,g)}return this.caret=0,this.current=f,0==d.args.length||"input"in r&&r.input>=d.args.length?this.current=this.current.nextSibling:(this.down_from_f_to_blank(),this.caret=this.current.firstChild.textContent.length),this.sel_clear(),this.checkpoint(),!0},x.prototype.sel_get=function(){if(this.sel_status==x.SEL_NONE)return null;var e,t=[],r=[];if(this.sel_start.node==this.sel_end.node)return{node_list:[this.make_e(this.sel_start.node.firstChild.nodeValue.substring(this.sel_start.caret,this.sel_end.caret))],remnant:this.make_e(this.sel_start.node.firstChild.nodeValue.substring(0,this.sel_start.caret)+this.sel_end.node.firstChild.nodeValue.substring(this.sel_end.caret)),involved:[this.sel_start.node]};r.push(this.make_e(this.sel_start.node.firstChild.nodeValue.substring(this.sel_start.caret))),t.push(this.sel_start.node),t.push(this.sel_end.node),e=this.make_e(this.sel_start.node.firstChild.nodeValue.substring(0,this.sel_start.caret)+this.sel_end.node.firstChild.nodeValue.substring(this.sel_end.caret));for(var n=this.sel_start.node.nextSibling;null!=n&&n!=this.sel_end.node;)t.push(n),r.push(n),n=n.nextSibling;return r.push(this.make_e(this.sel_end.node.firstChild.nodeValue.substring(0,this.sel_end.caret))),{node_list:r,remnant:e,involved:t,cursor:0}},x.prototype.make_e=function(e){var t=this.doc.base,r=t.createElement("e");return r.appendChild(t.createTextNode(e)),r},x.prototype.insert_string=function(e){var t=this;this.sel_status!=x.SEL_NONE&&(this.sel_delete(),this.sel_clear()),this.current.firstChild.nodeValue=this.current.firstChild.nodeValue.splice(this.caret,e),this.caret+=e.length,this.checkpoint(),"auto"==this.setting("autoreplace")&&this.check_for_symbol(!1),"whole"==this.setting("autoreplace")&&this.check_for_symbol(!0),"delay"==this.setting("autoreplace")&&setTimeout&&(this.delayed_check&&clearTimeout(this.delayed_check),this.delayed_check=setTimeout(function(){t.check_for_symbol(!1)},200))},x.prototype.insert_doc=function(e){this.insert_nodes(e.root().childNodes,!0)},x.prototype.sel_copy=function(){var e=this.sel_get();if(e){x.clipboard=[];var t=this.setting("cliptype");if("none"!=t)var r=new y("<m></m>");for(var n=0;n<e.node_list.length;n++){var i=e.node_list[n].cloneNode(!0);x.clipboard.push(i),"none"!=t&&r.root().appendChild(i.cloneNode(!0))}if("none"!=t)try{this.system_copy(r.get_content(t))}catch(e){this.system_copy("Syntax error")}this.sel_clear()}},x.prototype.system_copy=function(e){if(window.clipboardData&&window.clipboardData.setData)return window.clipboardData.setData("Text",e);if(document.queryCommandSupported&&document.queryCommandSupported("copy")){var t=document.createElement("textarea");t.textContent=e,t.style.position="fixed",t.style.background="transparent",document.body.appendChild(t),t.select();try{return document.execCommand("copy")}catch(e){return!1}finally{document.body.removeChild(t)}}},x.prototype.sel_cut=function(){var e=this.sel_delete();if(e){x.clipboard=[];for(var t=this.setting("cliptype"),r="",n=0;n<e.length;n++){var i=e[n].cloneNode(!0);x.clipboard.push(i),"none"!=t&&(r+=this.doc.manual_render(t,i))}"none"!=t&&this.system_copy(r),this.sel_clear(),this.checkpoint()}},x.prototype.insert_nodes=function(e,t){for(var r=[],n=0;n<e.length;n++)r.push(e[n].cloneNode(!0));if(1==r.length)this.current.firstChild.nodeValue=this.current.firstChild.nodeValue.substring(0,this.caret)+r[0].firstChild.nodeValue+this.current.firstChild.nodeValue.substring(this.caret),t&&(this.caret+=r[0].firstChild.nodeValue.length);else{var i=this.make_e(r[r.length-1].firstChild.nodeValue+this.current.firstChild.nodeValue.substring(this.caret));this.current.firstChild.nodeValue=this.current.firstChild.nodeValue.substring(0,this.caret)+r[0].firstChild.nodeValue,null==this.current.nextSibling?this.current.parentNode.appendChild(i):this.current.parentNode.insertBefore(i,this.current.nextSibling);for(var a=1;a<r.length-1;a++)this.current.parentNode.insertBefore(r[a],i);t&&(this.current=i,this.caret=r[r.length-1].firstChild.nodeValue.length)}},x.prototype.sel_paste=function(){this.sel_delete(),this.sel_clear(),x.clipboard&&0!=x.clipboard.length&&(this.insert_nodes(x.clipboard,!0),this.checkpoint())},x.prototype.sel_clear=function(){this.sel_start=null,this.sel_end=null,this.sel_status=x.SEL_NONE},x.prototype.sel_delete=function(){var e=this.sel_get();if(!e)return null;for(var t=e.involved[0].parentNode,r=e.involved[0].previousSibling,n=0;n<e.involved.length;n++){var i=e.involved[n];t.removeChild(i)}return null==r?null==t.firstChild?t.appendChild(e.remnant):t.insertBefore(e.remnant,t.firstChild):"f"==r.nodeName&&(null==r.nextSibling?t.appendChild(e.remnant):t.insertBefore(e.remnant,r.nextSibling)),this.current=e.remnant,this.caret=this.sel_start.caret,e.node_list},x.prototype.sel_all=function(){this.home(),this.set_sel_start(),this.end(),this.set_sel_end(),this.sel_start.node==this.sel_end.node&&this.sel_start.caret==this.sel_end.caret||(this.sel_status=x.SEL_CURSOR_AT_END)},x.prototype.sel_right=function(){if(this.sel_status==x.SEL_NONE&&(this.set_sel_start(),this.sel_status=x.SEL_CURSOR_AT_END),this.caret>=S.get_length(this.current)){var e=this.current.nextSibling;null!=e&&(this.current=e.nextSibling,this.caret=0),this.set_sel_boundary(x.SEL_CURSOR_AT_END)}else this.caret+=1,this.set_sel_boundary(x.SEL_CURSOR_AT_END);this.sel_start.node==this.sel_end.node&&this.sel_start.caret==this.sel_end.caret&&(this.sel_status=x.SEL_NONE)},x.prototype.set_sel_boundary=function(e,t){(this.sel_status==x.SEL_NONE||t)&&(this.sel_status=e),this.sel_status==x.SEL_CURSOR_AT_START?this.set_sel_start():this.sel_status==x.SEL_CURSOR_AT_END&&this.set_sel_end()},x.prototype.sel_left=function(){if(this.sel_status==x.SEL_NONE&&(this.set_sel_end(),this.sel_status=x.SEL_CURSOR_AT_START),this.caret<=0){var e=this.current.previousSibling;null!=e&&(this.current=e.previousSibling,this.caret=this.current.firstChild.nodeValue.length),this.set_sel_boundary(x.SEL_CURSOR_AT_START)}else this.caret-=1,this.set_sel_boundary(x.SEL_CURSOR_AT_START);this.sel_start.node==this.sel_end.node&&this.sel_start.caret==this.sel_end.caret&&(this.sel_status=x.SEL_NONE)},x.prototype.list_extend_copy_right=function(){this.list_extend("right",!0)},x.prototype.list_extend_copy_left=function(){this.list_extend("left",!0)},x.prototype.list_extend_right=function(){this.list_extend("right",!1)},x.prototype.list_extend_left=function(){this.list_extend("left",!1)},x.prototype.list_extend_up=function(){this.list_extend("up",!1)},x.prototype.list_extend_down=function(){this.list_extend("down",!1)},x.prototype.list_extend_copy_up=function(){this.list_extend("up",!0)},x.prototype.list_extend_copy_down=function(){this.list_extend("down",!0)},x.prototype.list_vertical_move=function(e){for(var t=this.current;t.parentNode&&t.parentNode.parentNode&&("c"!=t.nodeName||"l"!=t.parentNode.nodeName||"l"!=t.parentNode.parentNode.nodeName);)t=t.parentNode;if(t.parentNode){for(var r=1,n=t;null!=n.previousSibling;)r++,n=n.previousSibling;var i=e?t.parentNode.nextSibling:t.parentNode.previousSibling;if(i){for(var a=1,o=i.firstChild;a<r;)a++,o=o.nextSibling;this.current=o.firstChild,this.caret=e?0:this.current.firstChild.textContent.length}}},x.prototype.list_extend=function(e,t){for(var r=this.doc.base,n="up"==e||"down"==e,i="up"==e||"left"==e,a=n?"l":"c",o=this.current;o.parentNode&&(o.nodeName!=a||"l"!=o.parentNode.nodeName);)o=o.parentNode;if(o.parentNode){var s;if(!n&&"l"==o.parentNode.parentNode.nodeName){(s=r.createElement("c")).appendChild(this.make_e(""));for(var l=1,h=o;null!=h.previousSibling;)l++,h=h.previousSibling;var u=[],c=this.doc.xpath_list("./l/c[position()="+l+"]",o.parentNode.parentNode),p=null;try{for(p=c.iterateNext();null!=p;p=c.iterateNext())u.push(p)}catch(e){this.fire_event("error",{message:"XML modified during iteration? "+e})}for(var d=0;d<u.length;d++)p=u[d],t?p.parentNode.insertBefore(p.cloneNode(!0),i?p:p.nextSibling):p.parentNode.insertBefore(s.cloneNode(!0),i?p:p.nextSibling),p.parentNode.setAttribute("s",parseInt(p.parentNode.getAttribute("s"))+1);return this.sel_clear(),this.current=i?o.previousSibling.lastChild:o.nextSibling.firstChild,this.caret=this.current.firstChild.textContent.length,void this.checkpoint()}if(t)s=o.cloneNode(!0);else if(n){(s=r.createElement("l")).setAttribute("s",o.getAttribute("s"));for(var m=0;m<parseInt(o.getAttribute("s"));m++){var f=r.createElement("c");f.appendChild(this.make_e("")),s.appendChild(f)}}else(s=r.createElement("c")).appendChild(this.make_e(""));o.parentNode.setAttribute("s",parseInt(o.parentNode.getAttribute("s"))+1),o.parentNode.insertBefore(s,i?o:o.nextSibling),this.sel_clear(),this.current=n?s.firstChild.firstChild:s.firstChild,this.caret=0,this.checkpoint()}},x.prototype.list_remove_col=function(){for(var e=this.current;e.parentNode&&e.parentNode.parentNode&&("c"!=e.nodeName||"l"!=e.parentNode.nodeName||"l"!=e.parentNode.parentNode.nodeName);)e=e.parentNode;if(e.parentNode){if(null!=e.previousSibling)this.current=e.previousSibling.lastChild,this.caret=e.previousSibling.lastChild.firstChild.textContent.length;else{if(null==e.nextSibling)return;this.current=e.nextSibling.firstChild,this.caret=0}for(var t=1,r=e;null!=r.previousSibling;)t++,r=r.previousSibling;var n=[],i=this.doc.xpath_list("./l/c[position()="+t+"]",e.parentNode.parentNode),a=null;try{for(a=i.iterateNext();null!=a;a=i.iterateNext())n.push(a)}catch(e){this.fire_event("error",{message:"XML modified during iteration? "+e})}for(var o=0;o<n.length;o++)(a=n[o]).parentNode.setAttribute("s",parseInt(a.parentNode.getAttribute("s"))-1),a.parentNode.removeChild(a);this.checkpoint()}},x.prototype.list_remove_row=function(){for(var e=this.current;e.parentNode&&("l"!=e.nodeName||"l"!=e.parentNode.nodeName);)e=e.parentNode;if(e.parentNode){if(null!=e.previousSibling)this.current=e.previousSibling.firstChild.lastChild,this.caret=e.previousSibling.lastChild.firstChild.textContent.length;else{if(null==e.nextSibling)return;this.current=e.nextSibling.firstChild.firstChild,this.caret=0}e.parentNode.setAttribute("s",parseInt(e.parentNode.getAttribute("s"))-1),e.parentNode.removeChild(e),this.checkpoint()}},x.prototype.list_remove=function(){for(var e=this.current;e.parentNode&&("c"!=e.nodeName||"l"!=e.parentNode.nodeName);)e=e.parentNode;if(e.parentNode)if(e.parentNode.parentNode&&"l"==e.parentNode.parentNode.nodeName)this.list_remove_col();else{if(null!=e.previousSibling)this.current=e.previousSibling.lastChild,this.caret=e.previousSibling.lastChild.firstChild.textContent.length;else{if(null==e.nextSibling)return;this.current=e.nextSibling.firstChild,this.caret=0}e.parentNode.setAttribute("s",parseInt(e.parentNode.getAttribute("s"))-1),e.parentNode.removeChild(e),this.checkpoint()}},x.prototype.right=function(){if(this.sel_clear(),this.caret>=S.get_length(this.current)){var e=this.doc.xpath_node("following::e[1]",this.current);null!=e?(this.current=e,this.caret=0):this.fire_event("right_end")}else this.caret+=1},x.prototype.spacebar=function(){S.is_text(this.current)?this.insert_string(" "):this.space_caret=this.caret},x.prototype.left=function(){if(this.sel_clear(),this.caret<=0){var e=this.doc.xpath_node("preceding::e[1]",this.current);null!=e?(this.current=e,this.caret=this.current.firstChild.nodeValue.length):this.fire_event("left_end")}else this.caret-=1},x.prototype.delete_from_c=function(){for(var e=0,t=this.current.parentNode;t&&"c"==t.nodeName;)e++,t=t.previousSibling;for(var r=this.current.parentNode.getAttribute("delete"),n=[],i=this.doc.xpath_node("./c[position()="+r+"]",this.current.parentNode.parentNode).firstChild;null!=i;i=i.nextSibling)n.push(i);this.current=this.current.parentNode.parentNode,this.delete_from_f(),this.insert_nodes(n,r<e)},x.prototype.delete_from_e=function(){if(0<this.caret)this.current.firstChild.nodeValue=this.current.firstChild.nodeValue.splicen(this.caret-1,"",1),this.caret--;else if(null!=this.current.previousSibling&&S.is_char(this.current.previousSibling))this.current=this.current.previousSibling,this.delete_from_f();else{if(null!=this.current.previousSibling&&"f"==this.current.previousSibling.nodeName)return this.left(),!1;if(null!=this.current.parentNode.previousSibling&&"c"==this.current.parentNode.previousSibling.nodeName){if(!this.current.parentNode.hasAttribute("delete"))return this.left(),!1;this.delete_from_c()}else{if(null!=this.current.previousSibling||"c"!=this.current.parentNode.nodeName||null!=this.current.parentNode.previousSibling&&"c"==this.current.parentNode.previousSibling.nodeName)return!1;for(var e=this.current.parentNode;"l"==e.parentNode.nodeName||"c"==e.parentNode.nodeName;)e=e.parentNode;e.hasAttribute("delete")?this.delete_from_c():(this.current=e.parentNode,this.delete_from_f())}}return!0},x.prototype.delete_forward_from_e=function(){if(this.caret<this.current.firstChild.nodeValue.length)this.current.firstChild.nodeValue=this.current.firstChild.nodeValue.splicen(this.caret,"",1);else if(null!=this.current.nextSibling)this.current=this.current.nextSibling,this.delete_from_f();else if("c"==this.current.parentNode.nodeName)return!1;return!0},x.prototype.backspace=function(){this.sel_status!=x.SEL_NONE?(this.sel_delete(),this.sel_status=x.SEL_NONE,this.checkpoint()):this.delete_from_e()&&this.checkpoint()},x.prototype.delete_key=function(){this.sel_status!=x.SEL_NONE?(this.sel_delete(),this.sel_status=x.SEL_NONE,this.checkpoint()):this.delete_forward_from_e()&&this.checkpoint()},x.prototype.backslash=function(){S.is_text(this.current)||this.insert_symbol("sym_name")},x.prototype.tab=function(){if(S.is_symbol(this.current)||!this.check_for_symbol())if(S.is_utf8entry(this.current)){var e=this.current.firstChild.textContent;this.complete_utf8(e)}else{var t=this.current.firstChild.textContent,r=[];for(var n in this.symbols)n.startsWith(t)&&r.push(n);1==r.length?(this.current.firstChild.textContent=r[0],this.caret=r[0].length,this.check_for_symbol()):this.fire_event("completion",{candidates:r})}},x.prototype.right_paren=function(){"e"==this.current.nodeName&&this.caret<this.current.firstChild.nodeValue.length-1||this.right()},x.prototype.up=function(){if(this.sel_clear(),this.current.parentNode.hasAttribute("up")){for(var e=parseInt(this.current.parentNode.getAttribute("up")),t=this.current.parentNode.parentNode.firstChild;null!=t&&0<e;)"c"==t.nodeName&&e--,0<e&&(t=t.nextSibling);this.current=t.lastChild,this.caret=this.current.firstChild.nodeValue.length}else this.list_vertical_move(!1)},x.prototype.down=function(){if(this.sel_clear(),this.current.parentNode.hasAttribute("down")){for(var 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e=this.undo_data[this.undo_now-1]?(new XMLSerializer).serializeToString(this.undo_data[this.undo_now-1]):"[none]",t=(new XMLSerializer).serializeToString(this.undo_data[this.undo_now]);this.fire_event("change",{old:e,new:t})}},x.prototype.done=function(){if(S.is_symbol(this.current))this.complete_symbol();else if(S.is_utf8entry(this.current)){var e=this.current.firstChild.textContent;this.complete_utf8(e)}else this.fire_event("done")},x.prototype.complete_symbol=function(){var e=this.current.firstChild.textContent;this.symbols[e]&&(this.current=this.current.parentNode.parentNode,this.delete_from_f(),this.insert_symbol(e))},x.prototype.complete_utf8=function(e){e=parseInt("0x"+e),this.current=this.current.parentNode.parentNode,this.delete_from_f(),this.insert_utf8(e)},x.prototype.insert_utf8=function(e){if(e<=65535){var t=String.fromCharCode(e);this.insert_string(t)}else 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this._directMap[e+":"+t]&&this._directMap[e+":"+t]({},e),this},i.prototype.reset=function(){return this._callbacks={},this._directMap={},this},i.prototype.stopCallback=function(e,t){return!(-1<(" "+t.className+" ").indexOf(" mousetrap ")||function e(t,r){return null!==t&&t!==n&&(t===r||e(t.parentNode,r))}(t,this.target))&&("INPUT"==t.tagName||"SELECT"==t.tagName||"TEXTAREA"==t.tagName||t.isContentEditable)},i.prototype.handleKey=function(){return this._handleKey.apply(this,arguments)},i.addKeycodes=function(e){for(var t in e)e.hasOwnProperty(t)&&(l[t]=e[t]);s=null},i.init=function(){var e,t=i(n);for(e in t)"_"!==e.charAt(0)&&(i[e]=function(e){return function(){return t[e].apply(t,arguments)}}(e))},i.init(),e.Mousetrap=i,o.exports&&(o.exports=i)}}("undefined"!=typeof window?window:null,"undefined"!=typeof window?document:null)}),C=function e(t){e.initialised||e.init();var r="string"==typeof t?document.getElementById(t):t,n=e.instances.get(r);if(n)return n;e.instances.set(r,this);var i=e.max_tabIndex||0;r.tabIndex=i,e.max_tabIndex=i+1,this.editor_active=!0,this.editor=r,this.blacklist=[],this.autoreplace=!0,this.engine=new x(this),this.temp_cursor={node:null,caret:0},this.editor.addEventListener("keydown",e.key_down,!1),this.editor.addEventListener("keyup",e.key_up,!1),this.editor.addEventListener("focus",function(){e.kb.alt_down=!1},!1),d.config.settings.buttons?this.set_buttons():this.configure("buttons",["settings","controls","symbols"]),this.render(!0),this.deactivate(),this.recompute_locations_paths()};return C.prototype.set_buttons=function(){var e=this.engine.setting("buttons"),t=this;if(e&&0!=e.length&&(this.buttons_div&&(this.buttons_div.parentElement.removeChild(this.buttons_div),delete this.buttons_div),this.buttons_div=document.createElement("div"),this.buttons_div.setAttribute("class","guppy_buttons"),e))for(var r=0;r<e.length;r++)"osk"==e[r]&&d.osk?C.make_button("keyboard",this.buttons_div,function(){d.osk.guppy==t?d.osk.detach(t):d.osk.attach(t)}):"settings"==e[r]?C.make_button("settings",this.buttons_div,function(){d.toggle("settings",t)}):"symbols"==e[r]?C.make_button("symbols",this.buttons_div,function(){d.toggle("symbols",t)}):"controls"==e[r]&&C.make_button("help",this.buttons_div,function(){d.toggle("controls",t)})},C.instances=new Map,C.Doc=y,C.active_guppy=null,C.Symbols=w,C.Mousetrap=_,C.katex=v,C.raw_input_target=null,(C.raw_input=document.createElement("input")).setAttribute("type","text"),C.raw_input.setAttribute("class","guppy-raw"),C.raw_input.style="position:absolute;top:0;left:0;display:none;",C.raw_input.addEventListener("keyup",function(e){var t=C.raw_input_target;if(t)if(13==e.keyCode){t.activate();var r=C.raw_input.value;r=r.normalize();var n=!0,i=!1,a=void 0;try{for(var o,s=r[Symbol.iterator]();!(n=(o=s.next()).done);n=!0){var l=o.value;t.engine.insert_utf8(l.codePointAt(0))}}catch(e){i=!0,a=e}finally{try{!n&&s.return&&s.return()}finally{if(i)throw a}}C.raw_input.value="",C.raw_input.style.display="none",t.render(!0),C.hide_raw_input(),t.engine.fire_event("focus",{focused:!0})}else 27==e.keyCode&&(C.hide_raw_input(),t.engine.fire_event("focus",{focused:!0}))}),C.get_raw_input=function(){var e=C.active_guppy;if(e){var t=(C.raw_input_target=e).editor.getElementsByClassName("cursor")[0].getBoundingClientRect(),r=t.bottom-t.top;C.raw_input.style.top=t.bottom+document.documentElement.scrollTop-r/2+"px",C.raw_input.style.left=t.left+document.documentElement.scrollLeft+"px",C.raw_input.style.display="block",C.raw_input.focus(),C.OSK&&C.OSK.detach()}},C.hide_raw_input=function(){C.raw_input_target=null,C.raw_input.style.display="none"},C.make_button=function(e,t,r){var n=document.createElement("div");return n.setAttribute("class","guppy-button "+e),t.appendChild(n),r&&n.addEventListener("mouseup",function(e){return r(e),null!=e.cancelBubble&&(e.cancelBubble=!0),e.stopPropagation&&e.stopPropagation(),e.preventDefault(),!1},!1),n},C.add_global_symbol=function(e,t,r){r&&(t=w.make_template_symbol(r,e,t)),w.symbols[e]=JSON.parse(JSON.stringify(t));var n=!0,i=!1,a=void 0;try{for(var o,s=C.instances[Symbol.iterator]();!(n=(o=s.next()).done);n=!0){b(o.value,2)[1].engine.symbols[e]=JSON.parse(JSON.stringify(t))}}catch(e){i=!0,a=e}finally{try{!n&&s.return&&s.return()}finally{if(i)throw a}}},C.add_template=function(e,t){w.templates[e]=JSON.parse(JSON.stringify(t))},C.remove_global_symbol=function(e){if(w.symbols[e]){delete w.symbols[e];var t=!0,r=!1,n=void 0;try{for(var i,a=C.instances[Symbol.iterator]();!(t=(i=a.next()).done);t=!0){var o=b(i.value,2)[1];o.engine.symbols[e]&&delete o.engine.symbols[e]}}catch(e){r=!0,n=e}finally{try{!t&&a.return&&a.return()}finally{if(r)throw n}}}},C.configure=function(e,t){if(e in d.settings_options&&-1==d.settings_options[e].indexOf(t))throw"Valid values for "+e+" are 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a=n[i];if("mstyle"!=a.nodeName&&(0!=(r=a.getBoundingClientRect()).top||0!=r.bottom||0!=r.left||0!=r.right))for(var o=a.classList,s=0;s<o.length;s++)if(0==o[s].indexOf("guppy_loc")){e.push({path:o[s],top:r.top,bottom:r.bottom,left:r.left,right:r.right,mid_x:(r.left+r.right)/2,mid_y:(r.bottom+r.top)/2,blank:0<=(" "+a.className+" ").indexOf(" guppy_blank ")});break}}this.boxes=e}},C.get_loc=function(e,t,r,n){var i,a=C.active_guppy,o=-1,s=0,l="",h=null,u=null;if(a.editor.getElementsByClassName("katex")[0]){if(r)var c=S.path_to(r),p=parseInt(c.substring(c.lastIndexOf("e")+1));var d=a.boxes;if(d){if(r){c=c.replace(/e[0-9]+$/,"e");for(var m=[],f=0;f<d.length;f++)if("all"!=d[f].path){var g=d[f].path.substring(0,d[f].path.lastIndexOf("_"));(g=g.replace(/e[0-9]+$/,"e"))==c&&m.push(d[f])}d=m}if(d){for(var v=0;v<d.length;v++){var y=d[v];if("all"!=y.path){var b=Math.max(y.left-e,e-y.right,0),x=Math.max(y.top-t,t-y.bottom,0),_=Math.sqrt(b*b+x*x);(-1==o||_<o)&&(o=_,s=e-y.mid_x,h=y)}else h||(h={path:"guppy_loc_m_e1_0"})}g=(g=(g=h.path.substring("guppy_loc".length)).replace(/_/g,"/")).replace(/([0-9]+)(?=.*?\/)/g,"[$1]"),i=a.engine.doc.xpath_node(g.substring(0,g.lastIndexOf("/")),a.engine.doc.root()),u=parseInt(g.substring(g.lastIndexOf("/")+1)),0<s&&!h.blank&&u++;var w={current:i,caret:u,pos:l};if(r&&h){var k=parseInt(h.path.substring(h.path.lastIndexOf("e")+1,h.path.lastIndexOf("_")));k<p?l="left":p<k?l="right":u<n?l="left":n<u&&(l="right"),w.pos=l||"none"}return w}}}},C.mouse_up=function(){C.kb.is_mouse_down=!1;var e=C.active_guppy;e&&e.render(!0)},C.touch_start=function(e){for(var t=e.changedTouches[0],r=t.target;null!=r;){if(C.instances.get(r)){e.preventDefault();var n=C.active_guppy,i=!0,a=!1,o=void 0;try{for(var s,l=C.instances[Symbol.iterator]();!(i=(s=l.next()).done);i=!0){var h=b(s.value,2),u=h[0],c=h[1];u!==r?c.deactivate():c.activate()}}catch(e){a=!0,o=e}finally{try{!i&&l.return&&l.return()}finally{if(a)throw o}}var p=C.active_guppy,d=C.active_guppy.engine;if(p.space_caret=0,n==p){var m=C.get_loc(t.clientX,t.clientY);if(!m)return;d.current=m.current,d.caret=m.caret,d.sel_status=x.SEL_NONE,p.render(!0)}return}if(r.classList&&r.classList.contains("guppy_osk"))return;r=r.parentNode}},C.touch_move=function(e){var t=e.changedTouches[0],r=C.active_guppy;if(r)for(var n=t.target;null!=n;){C.instances.get(n)==r&&(r.select_to(t.clientX,t.clientY,!0),r.render(r.is_changed())),n=n.parentNode}},C.mouse_down=function(e){var etc=e.target.getAttribute("class");if(etc&&etc.startsWith("oppia-osk-btn"))return;if("guppy-button"!=etc){var t=e.target;for(C.kb.is_mouse_down=!0;null!=t;){if(C.instances.get(t)){e.preventDefault();var r=C.active_guppy,n=!0,i=!1,a=void 0;try{for(var o,s=C.instances[Symbol.iterator]();!(n=(o=s.next()).done);n=!0){var l=b(o.value,2),h=l[0],u=l[1];h!==t?u.deactivate():u.activate()}}catch(e){i=!0,a=e}finally{try{!n&&s.return&&s.return()}finally{if(i)throw a}}var c=C.active_guppy,p=C.active_guppy.engine;if(c.space_caret=0,r==c){if(e.shiftKey)c.select_to(e.clientX,e.clientY,!0);else{var d=C.get_loc(e.clientX,e.clientY);if(!d)return;p.current=d.current,p.caret=d.caret,p.sel_status=x.SEL_NONE}c.render(!0)}return}if(t.classList&&t.classList.contains("guppy_osk"))return;t=t.parentNode}var m=!(C.active_guppy=null),f=!1,g=void 0;try{for(var v,y=C.instances[Symbol.iterator]();!(m=(v=y.next()).done);m=!0){b(v.value,2)[1].deactivate()}}catch(e){f=!0,g=e}finally{try{!m&&y.return&&y.return()}finally{if(f)throw g}}}},C.mouse_move=function(e){var t=C.active_guppy;if(t)if(C.kb.is_mouse_down)t.select_to(e.clientX,e.clientY,!0),t.render(t.is_changed());else{var r=t.editor.getBoundingClientRect();if(e.clientX<r.left||e.clientX>r.right||e.clientY>r.bottom||e.clientY<r.top)t.temp_cursor={node:null,caret:0};else{var n=C.get_loc(e.clientX,e.clientY);if(!n)return;t.temp_cursor={node:n.current,caret:n.caret}}t.render(t.is_changed())}},C.prototype.select_to=function(e,t,r){var n=this.engine.caret,i=this.engine.current;this.engine.sel_status==x.SEL_CURSOR_AT_START?(i=this.engine.sel_end.node,n=this.engine.sel_end.caret):this.engine.sel_status==x.SEL_CURSOR_AT_END&&(i=this.engine.sel_start.node,n=this.engine.sel_start.caret);var a=C.get_loc(e,t,i,n);a&&this.engine.select_to(a,i,n,r)},window.addEventListener("touchstart",C.touch_start,!0),window.addEventListener("touchmove",C.touch_move,!0),window.addEventListener("mousedown",C.mouse_down,!0),window.addEventListener("mouseup",C.mouse_up,!0),window.addEventListener("mousemove",C.mouse_move,!1),C.prototype.render_node=function(e){var t="";if("render"!=e)return t=this.engine.get_content(e);var r=this.engine.doc.root();return this.engine.add_paths(r,"m"),this.engine.temp_cursor=this.temp_cursor,this.engine.add_classes_cursors(r),this.engine.current.setAttribute("current","yes"),this.temp_cursor.node&&this.temp_cursor.node.setAttribute("temp","yes"),t=this.engine.get_content("latex",!0),this.engine.remove_cursors_classes(r),t=t.replace(new RegExp("&amp;","g"),"&")},C.prototype.render=function(e){if(!this.editor_active&&this.engine.doc.is_blank())return v.render(this.engine.setting("empty_content"),this.editor),void(this.buttons_div&&this.editor.appendChild(this.buttons_div));var t=this.render_node("render");v.render(t,this.editor),this.buttons_div&&this.editor.appendChild(this.buttons_div),e&&this.recompute_locations_paths()},C.prototype.latex=function(){return this.engine.get_content("latex")},C.prototype.xml=function(){return this.engine.get_content("xml")},C.prototype.syntax_tree=function(){return this.engine.get_content("ast")},C.prototype.equations=function(){return this.engine.get_content("eqns")},C.prototype.text=function(){return this.engine.get_content("text")},C.prototype.asciimath=function(){return this.engine.get_content("asciimath")},C.prototype.doc=function(){return this.engine.doc},C.prototype.func=function(e){var t=this.engine.get_content("function",e),r=t.function;return r.vars=t.vars,r},C.prototype.evaluate=function(e){return this.engine.doc.evaluate(e)},C.prototype.symbols_used=function(e){return this.engine.doc.get_symbols(e)},C.prototype.vars=function(){return this.engine.get_content("function").vars},C.prototype.import_text=function(e){return this.engine.import_text(e)},C.prototype.import_latex=function(e){return this.engine.import_latex(e)},C.prototype.import_xml=function(e){return this.engine.set_content(e)},C.prototype.import_syntax_tree=function(e){return this.engine.import_ast(e)},C.prototype.activate=function(){var e=!this.editor_active;(C.active_guppy=this).editor_active=!0,this.editor.className=this.editor.className.replace(new RegExp("(\\s|^)guppy_inactive(\\s|$)")," guppy_active "),this.editor.focus(),this.render(!0),e&&this.engine.fire_event("focus",{focused:!0}),C.raw_input_target==this&&C.hide_raw_input()},C.prototype.deactivate=function(){var e=this.editor_active;this.editor_active=!1;var t=new RegExp("(?:\\s|^)guppy_active(?:\\s|$)"),r=new RegExp("(?:\\s|^)guppy_inactive(?:\\s|$)");this.editor.className.match(t)?this.editor.className=this.editor.className.replace(t," guppy_inactive "):this.editor.className.match(r)||(this.editor.className+=" guppy_inactive "),C.kb.shift_down=!1,C.kb.ctrl_down=!1,C.kb.alt_down=!1,d.hide_all(),C.hide_raw_input(),e&&(this.render(),this.engine.fire_event("focus",{focused:!1}))},C.kb=new p,C.register_keyboard_handlers=function(){var e,t;for(t in _.addKeycodes({173:"-"}),w.symbols){var r=w.symbols[t];if(r.keys)for(e=0;e<r.keys.length;e++)C.kb.k_syms[r.keys[e]]=r.attrs.type}for(e in C.kb.k_chars)_.bind(e,function(e){return function(){return!C.active_guppy||(C.active_guppy.temp_cursor.node=null,S.is_text(C.active_guppy.engine.current)&&C.kb.k_text[e]?C.active_guppy.engine.insert_string(C.kb.k_text[e]):C.active_guppy.engine.insert_string(C.kb.k_chars[e]),C.active_guppy.render(!0),!1)}}(e));for(e in C.kb.k_syms)_.bind(e,function(e){return function(){return!C.active_guppy||(C.active_guppy.temp_cursor.node=null,S.is_text(C.active_guppy.engine.current)?C.kb.k_text[e]&&C.active_guppy.engine.insert_string(C.kb.k_text[e]):(C.active_guppy.engine.space_caret=0,C.active_guppy.engine.insert_symbol(w.lookup_type(C.kb.k_syms[e]))),C.active_guppy.render(!0),!1)}}(e));for(e in C.kb.k_controls)_.bind(e,function(e){return function(){return!C.active_guppy||(S.is_text(C.active_guppy.engine.current)&&C.kb.k_text[e]?C.active_guppy.engine.insert_string(C.kb.k_text[e]):(C.active_guppy.engine.space_caret=0,C.active_guppy.engine[C.kb.k_controls[e]](),C.active_guppy.temp_cursor.node=null),C.active_guppy.render(["up","down","right","left","home","end","sel_left","sel_right"].indexOf(e)<0),!1)}}(e));for(e in C.kb.k_text)C.kb.k_chars[e]||C.kb.k_syms[e]||C.kb.k_controls[e]||_.bind(e,function(e){return function(){return!C.active_guppy||(C.active_guppy.temp_cursor.node=null,S.is_text(C.active_guppy.engine.current)&&C.active_guppy.engine.insert_string(C.kb.k_text[e]),C.active_guppy.render(!0),!1)}}(e));_.bind(C.kb.k_raw,function(){return!C.active_guppy||(C.get_raw_input(),!1)})},C.initialised=!1,C.init=function(){C.initialised||(d.init(w.symbols),C.register_keyboard_handlers(),document.body.appendChild(C.raw_input),C.initialised=!0)},C}();module.exports=Guppy;
+var Guppy=function(){"use strict";var m={to_eqlist:function(e){return 0==e[1].length||["=","!=","<=",">=","<",">"].indexOf(e[1][0][0])<0?[e]:m.to_eqlist(e[1][0]).concat([[e[0],[e[1][0][1][1],e[1][1]]]])},to_text:function(e){var t={bracket:function(e){return"("+e[0]+")"},"=":function(e){return e[0]+" = "+e[1]},"!=":function(e){return e[0]+" != "+e[1]},"<=":function(e){return e[0]+" <= "+e[1]},">=":function(e){return e[0]+" >= "+e[1]},"<":function(e){return e[0]+" < "+e[1]},">":function(e){return e[0]+" > "+e[1]},"*":function(e){return"("+e[0]+" * "+e[1]+")"},"+":function(e){return"("+e[0]+" + "+e[1]+")"},"/":function(e){return"("+e[0]+" / "+e[1]+")"},fraction:function(e){return"("+e[0]+" / "+e[1]+")"},"-":function(e){return 1==e.length?"-"+e[0]:"("+e[0]+" - "+e[1]+")"},val:function(e){return e[0]+""},var:function(e){return e[0]},subscript:function(e){return"("+e[0]+"_"+e[1]+")"},exponential:function(e){return"("+e[0]+"^"+e[1]+")"},factorial:function(e){return"("+e[0]+")!"},_default:function(e,t){return e+"("+t.join(",")+")"}};return m.eval(e,t)},to_xml:function(e,s,l){for(var n=function(e,t){e.documentElement.firstChild.textContent=t+e.documentElement.firstChild.textContent},a=function(e,t){var r=e.documentElement.lastChild,n=t.documentElement.firstChild;for(r.firstChild.textContent+=n.firstChild.textContent,n=n.nextSibling;n;n=n.nextSibling)r.parentNode.insertBefore(n.cloneNode(!0),null)},h=function(e){for(var t=e.getElementsByTagName("e"),r=0;r<t.length;r++)t[r].firstChild||t[r].appendChild(e.createTextNode(""))},i=function(e,t,r){var n,i=e[0].cloneNode(!0);return n=t,i.documentElement.lastChild.textContent+=n,a(i,e[1].cloneNode(!0)),r&&("*"==r[0]||"-"==r[0]&&1==r[1].length)?o("bracket",[i]):i},o=function(e,t){var r=function(e,t){for(var r in t)if(t[r].attrs.type==e)return t[r]}(e,s);if(!r)throw"Unrecognised symbol: "+e;var n=(new window.DOMParser).parseFromString("<c><e></e><e></e></c>","text/xml");h(n);var i=n.documentElement.firstChild,a=function(e){for(var t={},r=0;r<e.length;r++)if(t[r]=[],"l"==e[r].documentElement.nodeName)t[r].push(e[r].documentElement);else for(var n=e[r].documentElement.firstChild;n;n=n.nextSibling)t[r].push(n);return t}(t),o=l(r,a,n).f;return i.parentNode.insertBefore(o,i.nextSibling),h(n),n},t={},r=["<",">","=","<=",">=","!="],u=0;u<r.length;u++)t[r[u]]=function(i){return function(e){return r=i,n=(t=e)[0].cloneNode(!0),a(n,o(r,[])),a(n,t[1].cloneNode(!0)),n;var t,r,n}}(r[u]);t["*"]=function(e){var t=e[0].cloneNode(!0);return/[\d.]/.test(e[0].documentElement.lastChild.firstChild.textContent.slice(-1))&&/[\d.]/.test(e[1].documentElement.firstChild.firstChild.textContent.slice(0,1))&&a(t,o("*",[])),a(t,e[1].cloneNode(!0)),t},t["/"]=function(e){return o("fraction",e)},t["+"]=function(e,t){return i(e,"+",t)},t["-"]=function(e,t){if(1!=e.length)return i(e,"-",t);var r=e[0].cloneNode(!0);return n(r,"-"),r},t.neg=function(e){var t=e[0].cloneNode(!0);return n(t,"-"),t},t.val=function(e){return(new window.DOMParser).parseFromString("<c><e>"+e[0]+"</e></c>","text/xml")},t.var=function(e){return 1==e[0].length?(new window.DOMParser).parseFromString("<c><e>"+e[0]+"</e></c>","text/xml"):o(e[0],{})},t.list=function(e){for(var t=(new window.DOMParser).parseFromString("<l></l>","text/xml"),r=0;r<e.length;r++)t.documentElement.appendChild(e[r].documentElement.cloneNode(!0));return t.documentElement.setAttribute("s",String(e.length)),t},t._default=function(e,t){return o(e,t)};for(var c=m.eval(e,t),p=(new window.DOMParser).parseFromString("<m></m>","text/xml"),d=c.documentElement.firstChild;d;d=d.nextSibling)p.documentElement.insertBefore(d.cloneNode(!0),null);return p},get_nodes:function(e,t){if(e.length<2)return[];var r=[];if(e[0]==t&&r.push(e[1]),"var"==e[0]||"val"==e[0])return r;for(var n=0;n<e[1].length;n++)r=r.concat(m.get_nodes(e[1][n],t));return r},get_vars:function(e){for(var t={},r=[],n=m.get_nodes(e,"var"),i=0;i<n.length;i++)t[n[i][0]]=!0;for(var a in t)r.push(a);return r},to_function:function(e,t){t=t||{};var r={"*":function(t){return function(e){return t[0](e)*t[1](e)}},"+":function(t){return function(e){return t[0](e)+t[1](e)}},fraction:function(t){return function(e){return t[0](e)/t[1](e)}},"/":function(t){return function(e){return t[0](e)/t[1](e)}},"-":function(t){return 1==t.length?function(e){return-t[0](e)}:function(e){return t[0](e)-t[1](e)}},neg:function(t){return function(e){return-t[0](e)}},val:function(e){return function(){return e[0]}},var:function(t){return function(e){return"pi"==t[0]?Math.PI:"e"==t[0]?Math.E:e[t[0]]}},exponential:function(t){return function(e){return Math.pow(t[0](e),t[1](e))}},squareroot:function(t){return function(e){return Math.sqrt(t[0](e))}},absolutevalue:function(t){return function(e){return Math.abs(t[0](e))}},sin:function(t){return function(e){return Math.sin(t[0](e))}},cos:function(t){return function(e){return Math.cos(t[0](e))}},tan:function(t){return function(e){return Math.tan(t[0](e))}},log:function(t){return function(e){return Math.log(t[0](e))}}};for(var n in r)t[n]||(t[n]=r[n]);return{function:m.eval(e,t),vars:m.get_vars(e)}},eval:function(e,t,r){a=null,t._default||(t._default=function(e,t){throw Error("Function not implemented: "+e+"("+t+")")});for(var n=[],i=0;i<e[1].length;i++)"[object Array]"===Object.prototype.toString.call(e[1][i])?n.push(m.eval(e[1][i],t,e)):n.push(e[1][i]);var a=null;return t[e[0]]?a=t[e[0]](n,r):t._default&&(a=t._default(e[0],n,r)),a}},e=function(e){var o=this;this.token_types=e,this.symbol_table={},this.original_symbol={nud:function(){throw Error("Undefined")},led:function(){throw Error("Missing operator")}},this.mul=function(e){return["*",[e,this.nud()]]},this.symbol=function(e,t){var r=o.symbol_table[e];return t=t||0,r?t>=r.lbp&&(r.lbp=t):((r=Object.create(o.original_symbol)).id=r.value=e,r.lbp=t,(r.parent=o).symbol_table[e]=r),r},this.advance=function(e){var t,r,n,i;if(e&&this.token.id!==e)throw Error("Expected '"+e+"'");if(!(o.token_nr>=o.tokens.length)){n=o.tokens[o.token_nr],o.token_nr+=1,i=n.value;var a=null;if("name"===(t=n.type))r=this.symbol_table["(var)"];else if("operator"===t){if(!(r=this.symbol_table[i]))throw Error("Unknown operator")}else if("pass"===t)t="pass",r=this.symbol_table["(pass)"],a=n.args;else if("number"===t)t="literal",r=this.symbol_table["(literal)"];else{if("function"!==t)throw Error("Unexpected token",n);t="function",r=this.symbol_table["(function)"],a=n.args}return o.token=Object.create(r),o.token.type=t,o.token.value=i,a&&(o.token.args=a),o.token}o.token=this.symbol_table["(end)"]},this.expression=function(e){var t,r=o.token;for(o.advance(),t=r.nud();e<o.token.lbp;)r=o.token,o.advance(),t=r.led(t);return t},this.infix=function(e,t,r){var n=this.symbol(e,t);return n.led=r||function(e){return[this.value,[e,o.expression(t)]]},n},this.prefix=function(e,t){var r=o.symbol(e);return r.nud=t||function(){return"-"==this.value&&(this.value="neg"),[this.value,[o.expression(70)]]},r},this.symbol("(end)");var t=null;(t=this.symbol("(blank)",60)).nud=function(){return["blank"]},(t=this.symbol("(function)",60)).led=this.mul,t.nud=function(){return[this.value,this.args||[]]},(t=this.symbol("(literal)",60)).led=this.mul,t.nud=function(){return["val",[this.value]]},(t=this.symbol("(pass)",60)).led=this.mul,t.nud=function(){return this.args[0]},(t=this.symbol("(var)",60)).led=this.mul,t.nud=function(){return["var",[this.value]]},this.token_nr=0,this.tokens=[],this.infix("=",40),this.infix("!=",40),this.infix("<",40),this.infix(">",40),this.infix("<=",40),this.infix(">=",40),this.infix("+",50),this.infix("-",50),this.infix("*",60),this.infix("/",60),this.infix("!",70,function(e){return["factorial",[e]]}),this.infix("^",70,function(e){return["exponential",[e,o.expression(70)]]}),this.infix("_",70,function(e){return["subscript",[e,o.expression(70)]]}),this.infix("(",80,o.mul),this.symbol("(").nud=function(){var e=o.expression(0);return o.advance(")"),e},this.symbol(")"),this.symbol("{").nud=function(){var e=o.expression(0);return o.advance("}"),e},this.symbol("}"),this.symbol(","),this.prefix("-"),this.tokenise_and_parse=function(e){return this.parse(this.tokenise(e))},this.parse=function(e){return this.tokens=e,(this.token_nr=0)==this.tokens.length?["blank"]:(this.advance(),this.expression(10))}};e.prototype.tokenise=function(e){for(var t=[];0<e.length;){for(var r=!1,n=0;n<this.token_types.length;n++){var i=this.token_types[n],a=RegExp(i.re).exec(e);if(a){a=a[0],e=e.substring(a.length),r=!0,"space"!=i.type&&t.push({type:i.type,value:i.value(a)});break}}if(!r){if(!(128<e.charCodeAt(0)))return[];var o="",s=!0,l=!1,h=void 0;try{for(var u,c=e[Symbol.iterator]();!(s=(u=c.next()).done);s=!0){o=u.value;break}}catch(e){l=!0,h=e}finally{try{!s&&c.return&&c.return()}finally{if(l)throw h}}t.push({type:"name",value:o}),e=e.substring(o.length)}}return t};var t=new e([{type:"number",re:"^[0-9.]+",value:function(e){if(isNaN(Number(e)))throw Error("Invalid number: "+e);return Number(e)}},{type:"operator",re:"^(<=|>=|!=|>|<|=)",value:function(e){return e}},{type:"operator",re:"^[-+*/!]",value:function(e){return e}},{type:"name",re:"^[a-zA-Z]",value:function(e){return 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p(e,t){this.mode=void 0,this.gullet=void 0,this.settings=void 0,this.leftrightDepth=void 0,this.nextToken=void 0,this.mode="math",this.gullet=new yn(e,t,this.mode),this.settings=t,this.leftrightDepth=0}var e=p.prototype;return e.expect=function(e,t){if(void 0===t&&(t=!0),this.nextToken.text!==e)throw new U("Expected '"+e+"', got '"+this.nextToken.text+"'",this.nextToken);t&&this.consume()},e.consume=function(){this.nextToken=this.gullet.expandNextToken()},e.switchMode=function(e){this.mode=e,this.gullet.switchMode(e)},e.parse=function(){this.gullet.beginGroup(),this.settings.colorIsTextColor&&this.gullet.macros.set("\\color","\\textcolor"),this.consume();var e=this.parseExpression(!1);return this.expect("EOF",!1),this.gullet.endGroup(),e},e.parseExpression=function(e,t){for(var r=[];;){"math"===this.mode&&this.consumeSpaces();var n=this.nextToken;if(-1!==p.endOfExpression.indexOf(n.text))break;if(t&&n.text===t)break;if(e&&rn[n.text]&&rn[n.text].infix)break;var 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a={funcName:e,parser:this,token:n,breakOnTokenText:i},o=rn[e];if(o&&o.handler)return o.handler(a,t,r);throw new U("No function handler for "+e)},e.parseArguments=function(e,t){var r=t.numArgs+t.numOptionalArgs;if(0===r)return{args:[],optArgs:[]};for(var n=t.greediness,i=[],a=[],o=0;o<r;o++){var s=t.argTypes&&t.argTypes[o],l=o<t.numOptionalArgs;0<o&&!l&&this.consumeSpaces(),0!==o||l||"math"!==this.mode||this.consumeSpaces();var h=this.nextToken,u=this.parseGroupOfType("argument to '"+e+"'",s,l,n);if(!u){if(l){a.push(null);continue}throw new U("Expected group after '"+e+"'",h)}(l?a:i).push(u)}return{args:i,optArgs:a}},e.parseGroupOfType=function(e,t,r,n){switch(t){case"color":return this.parseColorGroup(r);case"size":return this.parseSizeGroup(r);case"url":return this.parseUrlGroup(r);case"math":case"text":return this.parseGroup(e,r,n,void 0,t);case"raw":var i=this.parseStringGroup("raw",r,!0);if(i)return{type:"raw",mode:"text",string:i.text};throw new U("Expected raw 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n=e[r],i=n.text;"-"===i&&"-"===e[r+1].text&&(r+1<t&&"-"===e[r+2].text?(e.splice(r,3,{type:"textord",mode:"text",loc:d.range(n,e[r+2]),text:"---"}),t-=2):(e.splice(r,2,{type:"textord",mode:"text",loc:d.range(n,e[r+1]),text:"--"}),t-=1)),"'"!==i&&"`"!==i||e[r+1].text!==i||(e.splice(r,2,{type:"textord",mode:"text",loc:d.range(n,e[r+1]),text:i+i}),t-=1)}},e.parseSymbol=function(){var e=this.nextToken,t=e.text;if(/^\\verb[^a-zA-Z]/.test(t)){this.consume();var r=t.slice(5),n="*"===r.charAt(0);if(n&&(r=r.slice(1)),r.length<2||r.charAt(0)!==r.slice(-1))throw new U("\\verb assertion failed --\n                    please report what input caused this bug");return{type:"verb",mode:"text",body:r=r.slice(1,-1),star:n}}if("%"===t)return this.consumeComment(),this.parseSymbol();xn.hasOwnProperty(t[0])&&!G[this.mode][t[0]]&&(this.settings.strict&&"math"===this.mode&&this.settings.reportNonstrict("unicodeTextInMathMode",'Accented Unicode text character "'+t[0]+'" used in math 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r=1,n=1,i=1,a=1,o=e.firstChild;null!=o;o=o.nextSibling)"c"==o.nodeName?(this.add_paths(o,t+"_c"+i),i++):"f"==o.nodeName?(this.add_paths(o,t+"_f"+n),n++):"l"==o.nodeName?(this.add_paths(o,t+"_l"+a),a++):"e"==o.nodeName&&(this.add_paths(o,t+"_e"+r),r++)},x.prototype.add_classes_cursors=function(e){if("e"==e.nodeName){var t,r=e.firstChild.nodeValue,n="",i=S.is_text(e);if(this.sel_status==x.SEL_CURSOR_AT_START&&(t=this.sel_end),this.sel_status==x.SEL_CURSOR_AT_END&&(t=this.sel_start),this.sel_status!=x.SEL_NONE){var a=S.is_small(t.node)?S.SMALL_SEL_CARET:S.SEL_CARET;a=0==r.length&&1<e.parentNode.childElementCount?"\\blue{\\xmlClass{guppy_elt guppy_blank guppy_loc_"+e.getAttribute("path")+"_0}{"+a+"}}":"\\blue{"+a+"}",this.sel_status==x.SEL_CURSOR_AT_END&&(a=a+"\\"+S.SEL_COLOR+"{"),this.sel_status==x.SEL_CURSOR_AT_START&&(a="}"+a)}var o="",s="";if(0==r.length)if(1==e.parentNode.childElementCount)if(this.current==e){var l=this.setting("blank_caret")||(S.is_small(this.current)?S.SMALL_CARET:S.CARET);n="\\red{\\xmlClass{main_cursor guppy_elt guppy_blank guppy_loc_"+e.getAttribute("path")+"_0}{"+l+"}}"}else{var h=this.setting("blank_placeholder")||"[?]";n=this.temp_cursor.node==e?"\\gray{\\xmlClass{guppy_elt guppy_blank guppy_loc_"+e.getAttribute("path")+"_0}{"+h+"}}":"\\blue{\\xmlClass{guppy_elt guppy_blank guppy_loc_"+e.getAttribute("path")+"_0}{"+h+"}}"}else this.temp_cursor.node==e||this.current==e||t&&t.node==e||(n="\\phantom{\\xmlClass{guppy_elt guppy_blank guppy_loc_"+e.getAttribute("path")+"_0}{\\hspace{0pt}}}");for(var u=0;u<r.length+1;u++)e==this.current&&u==this.caret&&(0<r.length||1<e.parentNode.childElementCount)?(o=S.is_small(this.current)?S.SMALL_CARET:S.CARET,o=0==r.length?"\\red{\\xmlClass{main_cursor guppy_elt guppy_blank guppy_loc_"+e.getAttribute("path")+"_0}{"+o+"}}":"\\red{\\xmlClass{main_cursor}{"+o+"}}",this.sel_status==x.SEL_CURSOR_AT_START?o=o+"\\"+S.SEL_COLOR+"{":this.sel_status==x.SEL_CURSOR_AT_END&&(o="}"+o),n+=o):this.sel_status!=x.SEL_NONE&&t.node==e&&u==t.caret?n+=a:this.temp_cursor.node==e&&u==this.temp_cursor.caret&&(0<r.length||1<e.parentNode.childElementCount)&&(s=S.is_small(this.current)?S.TEMP_SMALL_CARET:S.TEMP_CARET,n+=s=0==r.length?"\\gray{\\xmlClass{guppy_elt guppy_blank guppy_loc_"+e.getAttribute("path")+"_0}{"+s+"}}":"\\gray{"+s+"}"),u<r.length&&(n+="\\xmlClass{guppy_elt guppy_loc_"+e.getAttribute("path")+"_"+u+"}{"+r[u]+"}");i&&e==this.current&&(n="\\xmlClass{guppy_text_current}{{"+n+"}}"),e.setAttribute("render",n),e.removeAttribute("path")}else for(var c=e.firstChild;null!=c;c=c.nextSibling)"c"!=c.nodeName&&"l"!=c.nodeName&&"f"!=c.nodeName&&"e"!=c.nodeName||this.add_classes_cursors(c)},x.prototype.remove_cursors_classes=function(e){if("e"==e.nodeName)e.removeAttribute("path"),e.removeAttribute("render"),e.removeAttribute("current"),e.removeAttribute("temp");else for(var t=e.firstChild;null!=t;t=t.nextSibling)1==t.nodeType&&this.remove_cursors_classes(t)},x.prototype.down_from_f=function(){for(var e=this.current.firstChild;null!=e&&"c"!=e.nodeName&&"l"!=e.nodeName;)e=e.nextSibling;if(null!=e){for(;"l"==e.nodeName;)e=e.firstChild;this.current=e.firstChild}},x.prototype.down_from_f_to_blank=function(){for(var e=this.current.firstChild;null!=e&&("c"!=e.nodeName||1!=e.children.length||""!=e.firstChild.firstChild.nodeValue);)e=e.nextSibling;if(null!=e){for(;"l"==e.nodeName;)e=e.firstChild;if("c"!=e.nodeName||"e"!=e.firstChild.nodeName)return void this.problem("dfftb");this.current=e.firstChild}else this.down_from_f()},x.prototype.delete_from_f=function(e){var t=this.current,r=t.parentNode,n=t.previousSibling,i=t.nextSibling,a=e||"",o=this.make_e(n.firstChild.textContent+a+i.firstChild.textContent);this.current=o,this.caret=n.firstChild.textContent.length,r.insertBefore(o,n),r.removeChild(n),r.removeChild(t),r.removeChild(i)},x.prototype.symbol_to_node=function(e,t){return w.symbol_to_node(e,t,this.doc.base)},x.prototype.template_to_node=function(e,t,r,n){return w.symbol_to_node(w.make_template_symbol(e,r,n),t,this.doc.base)},x.prototype.insert_symbol=function(e,t){var r=t?w.make_template_symbol(e,t.name,t):this.symbols[e];if(r.attrs&&this.is_blacklisted(r.attrs.type))return!1;var n,i,a,o={},s="input"in r?r.input:0,l=[],h=null,u=!1;if(0<s)if(s--,this.sel_status!=x.SEL_NONE)l=(a=this.sel_get()).involved,n=this.make_e(a.remnant.firstChild.nodeValue.slice(0,this.sel_start.caret)),i=this.make_e(a.remnant.firstChild.nodeValue.slice(this.sel_start.caret)),o[s]=a.node_list;else if("input"in r)if(0==this.caret&&null!=this.current.previousSibling)o[s]=[this.make_e(""),this.current.previousSibling,this.make_e("")],h=this.current.previousSibling,u=!0;else{var c=this.current.firstChild.nodeValue.substring(0,this.caret),p=128<c.charCodeAt(c.length-1)?c[c.length-1]:c.match(/[0-9.]+$|[a-zA-Z]$/);null!=p&&0<p.length&&(p=p[0],n=this.make_e(this.current.firstChild.nodeValue.slice(0,this.caret-p.length)),i=this.make_e(this.current.firstChild.nodeValue.slice(this.caret)),o[s]=[this.make_e(p)])}u||null!=n&&null!=i||(this.sel_status!=x.SEL_NONE?(l=(a=this.sel_get()).involved,n=this.make_e(a.remnant.firstChild.nodeValue.slice(0,this.sel_start.caret)),i=this.make_e(a.remnant.firstChild.nodeValue.slice(this.sel_start.caret)),o="input"in r&&r.input<0?[]:[a.node_list]):(n=this.make_e(this.current.firstChild.nodeValue.slice(0,this.caret)),i=this.make_e(this.current.firstChild.nodeValue.slice(this.caret)),l=[this.current]));var d=this.symbol_to_node(r,o),m=this.current.parentNode,f=d.f,g=this.current.nextSibling;if(u)m.replaceChild(f,h);else{0==l.length&&this.current.parentNode.removeChild(this.current);for(var v=0;v<l.length;v++)g==l[v]&&(g=g.nextSibling),m.removeChild(l[v]);m.insertBefore(n,g),m.insertBefore(f,g),m.insertBefore(i,g)}return this.caret=0,this.current=f,0==d.args.length||"input"in r&&r.input>=d.args.length?this.current=this.current.nextSibling:(this.down_from_f_to_blank(),this.caret=this.current.firstChild.textContent.length),this.sel_clear(),this.checkpoint(),!0},x.prototype.sel_get=function(){if(this.sel_status==x.SEL_NONE)return null;var e,t=[],r=[];if(this.sel_start.node==this.sel_end.node)return{node_list:[this.make_e(this.sel_start.node.firstChild.nodeValue.substring(this.sel_start.caret,this.sel_end.caret))],remnant:this.make_e(this.sel_start.node.firstChild.nodeValue.substring(0,this.sel_start.caret)+this.sel_end.node.firstChild.nodeValue.substring(this.sel_end.caret)),involved:[this.sel_start.node]};r.push(this.make_e(this.sel_start.node.firstChild.nodeValue.substring(this.sel_start.caret))),t.push(this.sel_start.node),t.push(this.sel_end.node),e=this.make_e(this.sel_start.node.firstChild.nodeValue.substring(0,this.sel_start.caret)+this.sel_end.node.firstChild.nodeValue.substring(this.sel_end.caret));for(var n=this.sel_start.node.nextSibling;null!=n&&n!=this.sel_end.node;)t.push(n),r.push(n),n=n.nextSibling;return r.push(this.make_e(this.sel_end.node.firstChild.nodeValue.substring(0,this.sel_end.caret))),{node_list:r,remnant:e,involved:t,cursor:0}},x.prototype.make_e=function(e){var t=this.doc.base,r=t.createElement("e");return r.appendChild(t.createTextNode(e)),r},x.prototype.insert_string=function(e){var t=this;this.sel_status!=x.SEL_NONE&&(this.sel_delete(),this.sel_clear()),this.current.firstChild.nodeValue=this.current.firstChild.nodeValue.splice(this.caret,e),this.caret+=e.length,this.checkpoint(),"auto"==this.setting("autoreplace")&&this.check_for_symbol(!1),"whole"==this.setting("autoreplace")&&this.check_for_symbol(!0),"delay"==this.setting("autoreplace")&&setTimeout&&(this.delayed_check&&clearTimeout(this.delayed_check),this.delayed_check=setTimeout(function(){t.check_for_symbol(!1)},200))},x.prototype.insert_doc=function(e){this.insert_nodes(e.root().childNodes,!0)},x.prototype.sel_copy=function(){var e=this.sel_get();if(e){x.clipboard=[];var t=this.setting("cliptype");if("none"!=t)var r=new y("<m></m>");for(var n=0;n<e.node_list.length;n++){var i=e.node_list[n].cloneNode(!0);x.clipboard.push(i),"none"!=t&&r.root().appendChild(i.cloneNode(!0))}if("none"!=t)try{this.system_copy(r.get_content(t))}catch(e){this.system_copy("Syntax error")}this.sel_clear()}},x.prototype.system_copy=function(e){if(window.clipboardData&&window.clipboardData.setData)return window.clipboardData.setData("Text",e);if(document.queryCommandSupported&&document.queryCommandSupported("copy")){var t=document.createElement("textarea");t.textContent=e,t.style.position="fixed",t.style.background="transparent",document.body.appendChild(t),t.select();try{return document.execCommand("copy")}catch(e){return!1}finally{document.body.removeChild(t)}}},x.prototype.sel_cut=function(){var e=this.sel_delete();if(e){x.clipboard=[];for(var t=this.setting("cliptype"),r="",n=0;n<e.length;n++){var i=e[n].cloneNode(!0);x.clipboard.push(i),"none"!=t&&(r+=this.doc.manual_render(t,i))}"none"!=t&&this.system_copy(r),this.sel_clear(),this.checkpoint()}},x.prototype.insert_nodes=function(e,t){for(var r=[],n=0;n<e.length;n++)r.push(e[n].cloneNode(!0));if(1==r.length)this.current.firstChild.nodeValue=this.current.firstChild.nodeValue.substring(0,this.caret)+r[0].firstChild.nodeValue+this.current.firstChild.nodeValue.substring(this.caret),t&&(this.caret+=r[0].firstChild.nodeValue.length);else{var i=this.make_e(r[r.length-1].firstChild.nodeValue+this.current.firstChild.nodeValue.substring(this.caret));this.current.firstChild.nodeValue=this.current.firstChild.nodeValue.substring(0,this.caret)+r[0].firstChild.nodeValue,null==this.current.nextSibling?this.current.parentNode.appendChild(i):this.current.parentNode.insertBefore(i,this.current.nextSibling);for(var a=1;a<r.length-1;a++)this.current.parentNode.insertBefore(r[a],i);t&&(this.current=i,this.caret=r[r.length-1].firstChild.nodeValue.length)}},x.prototype.sel_paste=function(){this.sel_delete(),this.sel_clear(),x.clipboard&&0!=x.clipboard.length&&(this.insert_nodes(x.clipboard,!0),this.checkpoint())},x.prototype.sel_clear=function(){this.sel_start=null,this.sel_end=null,this.sel_status=x.SEL_NONE},x.prototype.sel_delete=function(){var e=this.sel_get();if(!e)return null;for(var t=e.involved[0].parentNode,r=e.involved[0].previousSibling,n=0;n<e.involved.length;n++){var i=e.involved[n];t.removeChild(i)}return null==r?null==t.firstChild?t.appendChild(e.remnant):t.insertBefore(e.remnant,t.firstChild):"f"==r.nodeName&&(null==r.nextSibling?t.appendChild(e.remnant):t.insertBefore(e.remnant,r.nextSibling)),this.current=e.remnant,this.caret=this.sel_start.caret,e.node_list},x.prototype.sel_all=function(){this.home(),this.set_sel_start(),this.end(),this.set_sel_end(),this.sel_start.node==this.sel_end.node&&this.sel_start.caret==this.sel_end.caret||(this.sel_status=x.SEL_CURSOR_AT_END)},x.prototype.sel_right=function(){if(this.sel_status==x.SEL_NONE&&(this.set_sel_start(),this.sel_status=x.SEL_CURSOR_AT_END),this.caret>=S.get_length(this.current)){var e=this.current.nextSibling;null!=e&&(this.current=e.nextSibling,this.caret=0),this.set_sel_boundary(x.SEL_CURSOR_AT_END)}else this.caret+=1,this.set_sel_boundary(x.SEL_CURSOR_AT_END);this.sel_start.node==this.sel_end.node&&this.sel_start.caret==this.sel_end.caret&&(this.sel_status=x.SEL_NONE)},x.prototype.set_sel_boundary=function(e,t){(this.sel_status==x.SEL_NONE||t)&&(this.sel_status=e),this.sel_status==x.SEL_CURSOR_AT_START?this.set_sel_start():this.sel_status==x.SEL_CURSOR_AT_END&&this.set_sel_end()},x.prototype.sel_left=function(){if(this.sel_status==x.SEL_NONE&&(this.set_sel_end(),this.sel_status=x.SEL_CURSOR_AT_START),this.caret<=0){var e=this.current.previousSibling;null!=e&&(this.current=e.previousSibling,this.caret=this.current.firstChild.nodeValue.length),this.set_sel_boundary(x.SEL_CURSOR_AT_START)}else this.caret-=1,this.set_sel_boundary(x.SEL_CURSOR_AT_START);this.sel_start.node==this.sel_end.node&&this.sel_start.caret==this.sel_end.caret&&(this.sel_status=x.SEL_NONE)},x.prototype.list_extend_copy_right=function(){this.list_extend("right",!0)},x.prototype.list_extend_copy_left=function(){this.list_extend("left",!0)},x.prototype.list_extend_right=function(){this.list_extend("right",!1)},x.prototype.list_extend_left=function(){this.list_extend("left",!1)},x.prototype.list_extend_up=function(){this.list_extend("up",!1)},x.prototype.list_extend_down=function(){this.list_extend("down",!1)},x.prototype.list_extend_copy_up=function(){this.list_extend("up",!0)},x.prototype.list_extend_copy_down=function(){this.list_extend("down",!0)},x.prototype.list_vertical_move=function(e){for(var t=this.current;t.parentNode&&t.parentNode.parentNode&&("c"!=t.nodeName||"l"!=t.parentNode.nodeName||"l"!=t.parentNode.parentNode.nodeName);)t=t.parentNode;if(t.parentNode){for(var r=1,n=t;null!=n.previousSibling;)r++,n=n.previousSibling;var i=e?t.parentNode.nextSibling:t.parentNode.previousSibling;if(i){for(var a=1,o=i.firstChild;a<r;)a++,o=o.nextSibling;this.current=o.firstChild,this.caret=e?0:this.current.firstChild.textContent.length}}},x.prototype.list_extend=function(e,t){for(var r=this.doc.base,n="up"==e||"down"==e,i="up"==e||"left"==e,a=n?"l":"c",o=this.current;o.parentNode&&(o.nodeName!=a||"l"!=o.parentNode.nodeName);)o=o.parentNode;if(o.parentNode){var s;if(!n&&"l"==o.parentNode.parentNode.nodeName){(s=r.createElement("c")).appendChild(this.make_e(""));for(var l=1,h=o;null!=h.previousSibling;)l++,h=h.previousSibling;var u=[],c=this.doc.xpath_list("./l/c[position()="+l+"]",o.parentNode.parentNode),p=null;try{for(p=c.iterateNext();null!=p;p=c.iterateNext())u.push(p)}catch(e){this.fire_event("error",{message:"XML modified during iteration? "+e})}for(var d=0;d<u.length;d++)p=u[d],t?p.parentNode.insertBefore(p.cloneNode(!0),i?p:p.nextSibling):p.parentNode.insertBefore(s.cloneNode(!0),i?p:p.nextSibling),p.parentNode.setAttribute("s",parseInt(p.parentNode.getAttribute("s"))+1);return this.sel_clear(),this.current=i?o.previousSibling.lastChild:o.nextSibling.firstChild,this.caret=this.current.firstChild.textContent.length,void this.checkpoint()}if(t)s=o.cloneNode(!0);else if(n){(s=r.createElement("l")).setAttribute("s",o.getAttribute("s"));for(var m=0;m<parseInt(o.getAttribute("s"));m++){var f=r.createElement("c");f.appendChild(this.make_e("")),s.appendChild(f)}}else(s=r.createElement("c")).appendChild(this.make_e(""));o.parentNode.setAttribute("s",parseInt(o.parentNode.getAttribute("s"))+1),o.parentNode.insertBefore(s,i?o:o.nextSibling),this.sel_clear(),this.current=n?s.firstChild.firstChild:s.firstChild,this.caret=0,this.checkpoint()}},x.prototype.list_remove_col=function(){for(var e=this.current;e.parentNode&&e.parentNode.parentNode&&("c"!=e.nodeName||"l"!=e.parentNode.nodeName||"l"!=e.parentNode.parentNode.nodeName);)e=e.parentNode;if(e.parentNode){if(null!=e.previousSibling)this.current=e.previousSibling.lastChild,this.caret=e.previousSibling.lastChild.firstChild.textContent.length;else{if(null==e.nextSibling)return;this.current=e.nextSibling.firstChild,this.caret=0}for(var t=1,r=e;null!=r.previousSibling;)t++,r=r.previousSibling;var n=[],i=this.doc.xpath_list("./l/c[position()="+t+"]",e.parentNode.parentNode),a=null;try{for(a=i.iterateNext();null!=a;a=i.iterateNext())n.push(a)}catch(e){this.fire_event("error",{message:"XML modified during iteration? "+e})}for(var o=0;o<n.length;o++)(a=n[o]).parentNode.setAttribute("s",parseInt(a.parentNode.getAttribute("s"))-1),a.parentNode.removeChild(a);this.checkpoint()}},x.prototype.list_remove_row=function(){for(var e=this.current;e.parentNode&&("l"!=e.nodeName||"l"!=e.parentNode.nodeName);)e=e.parentNode;if(e.parentNode){if(null!=e.previousSibling)this.current=e.previousSibling.firstChild.lastChild,this.caret=e.previousSibling.lastChild.firstChild.textContent.length;else{if(null==e.nextSibling)return;this.current=e.nextSibling.firstChild.firstChild,this.caret=0}e.parentNode.setAttribute("s",parseInt(e.parentNode.getAttribute("s"))-1),e.parentNode.removeChild(e),this.checkpoint()}},x.prototype.list_remove=function(){for(var e=this.current;e.parentNode&&("c"!=e.nodeName||"l"!=e.parentNode.nodeName);)e=e.parentNode;if(e.parentNode)if(e.parentNode.parentNode&&"l"==e.parentNode.parentNode.nodeName)this.list_remove_col();else{if(null!=e.previousSibling)this.current=e.previousSibling.lastChild,this.caret=e.previousSibling.lastChild.firstChild.textContent.length;else{if(null==e.nextSibling)return;this.current=e.nextSibling.firstChild,this.caret=0}e.parentNode.setAttribute("s",parseInt(e.parentNode.getAttribute("s"))-1),e.parentNode.removeChild(e),this.checkpoint()}},x.prototype.right=function(){if(this.sel_clear(),this.caret>=S.get_length(this.current)){var e=this.doc.xpath_node("following::e[1]",this.current);null!=e?(this.current=e,this.caret=0):this.fire_event("right_end")}else this.caret+=1},x.prototype.spacebar=function(){S.is_text(this.current)?this.insert_string(" "):this.space_caret=this.caret},x.prototype.left=function(){if(this.sel_clear(),this.caret<=0){var e=this.doc.xpath_node("preceding::e[1]",this.current);null!=e?(this.current=e,this.caret=this.current.firstChild.nodeValue.length):this.fire_event("left_end")}else this.caret-=1},x.prototype.delete_from_c=function(){for(var e=0,t=this.current.parentNode;t&&"c"==t.nodeName;)e++,t=t.previousSibling;for(var r=this.current.parentNode.getAttribute("delete"),n=[],i=this.doc.xpath_node("./c[position()="+r+"]",this.current.parentNode.parentNode).firstChild;null!=i;i=i.nextSibling)n.push(i);this.current=this.current.parentNode.parentNode,this.delete_from_f(),this.insert_nodes(n,r<e)},x.prototype.delete_from_e=function(){if(0<this.caret)this.current.firstChild.nodeValue=this.current.firstChild.nodeValue.splicen(this.caret-1,"",1),this.caret--;else if(null!=this.current.previousSibling&&S.is_char(this.current.previousSibling))this.current=this.current.previousSibling,this.delete_from_f();else{if(null!=this.current.previousSibling&&"f"==this.current.previousSibling.nodeName)return this.left(),!1;if(null!=this.current.parentNode.previousSibling&&"c"==this.current.parentNode.previousSibling.nodeName){if(!this.current.parentNode.hasAttribute("delete"))return this.left(),!1;this.delete_from_c()}else{if(null!=this.current.previousSibling||"c"!=this.current.parentNode.nodeName||null!=this.current.parentNode.previousSibling&&"c"==this.current.parentNode.previousSibling.nodeName)return!1;for(var e=this.current.parentNode;"l"==e.parentNode.nodeName||"c"==e.parentNode.nodeName;)e=e.parentNode;e.hasAttribute("delete")?this.delete_from_c():(this.current=e.parentNode,this.delete_from_f())}}return!0},x.prototype.delete_forward_from_e=function(){if(this.caret<this.current.firstChild.nodeValue.length)this.current.firstChild.nodeValue=this.current.firstChild.nodeValue.splicen(this.caret,"",1);else if(null!=this.current.nextSibling)this.current=this.current.nextSibling,this.delete_from_f();else if("c"==this.current.parentNode.nodeName)return!1;return!0},x.prototype.backspace=function(){this.sel_status!=x.SEL_NONE?(this.sel_delete(),this.sel_status=x.SEL_NONE,this.checkpoint()):this.delete_from_e()&&this.checkpoint()},x.prototype.delete_key=function(){this.sel_status!=x.SEL_NONE?(this.sel_delete(),this.sel_status=x.SEL_NONE,this.checkpoint()):this.delete_forward_from_e()&&this.checkpoint()},x.prototype.backslash=function(){S.is_text(this.current)||this.insert_symbol("sym_name")},x.prototype.tab=function(){if(S.is_symbol(this.current)||!this.check_for_symbol())if(S.is_utf8entry(this.current)){var e=this.current.firstChild.textContent;this.complete_utf8(e)}else{var t=this.current.firstChild.textContent,r=[];for(var n in this.symbols)n.startsWith(t)&&r.push(n);1==r.length?(this.current.firstChild.textContent=r[0],this.caret=r[0].length,this.check_for_symbol()):this.fire_event("completion",{candidates:r})}},x.prototype.right_paren=function(){"e"==this.current.nodeName&&this.caret<this.current.firstChild.nodeValue.length-1||this.right()},x.prototype.up=function(){if(this.sel_clear(),this.current.parentNode.hasAttribute("up")){for(var e=parseInt(this.current.parentNode.getAttribute("up")),t=this.current.parentNode.parentNode.firstChild;null!=t&&0<e;)"c"==t.nodeName&&e--,0<e&&(t=t.nextSibling);this.current=t.lastChild,this.caret=this.current.firstChild.nodeValue.length}else this.list_vertical_move(!1)},x.prototype.down=function(){if(this.sel_clear(),this.current.parentNode.hasAttribute("down")){for(var 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e=this.undo_data[this.undo_now-1]?(new XMLSerializer).serializeToString(this.undo_data[this.undo_now-1]):"[none]",t=(new XMLSerializer).serializeToString(this.undo_data[this.undo_now]);this.fire_event("change",{old:e,new:t})}},x.prototype.done=function(){if(S.is_symbol(this.current))this.complete_symbol();else if(S.is_utf8entry(this.current)){var e=this.current.firstChild.textContent;this.complete_utf8(e)}else this.fire_event("done")},x.prototype.complete_symbol=function(){var e=this.current.firstChild.textContent;this.symbols[e]&&(this.current=this.current.parentNode.parentNode,this.delete_from_f(),this.insert_symbol(e))},x.prototype.complete_utf8=function(e){e=parseInt("0x"+e),this.current=this.current.parentNode.parentNode,this.delete_from_f(),this.insert_utf8(e)},x.prototype.insert_utf8=function(e){if(e<=65535){var t=String.fromCharCode(e);this.insert_string(t)}else 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this._directMap[e+":"+t]&&this._directMap[e+":"+t]({},e),this},i.prototype.reset=function(){return this._callbacks={},this._directMap={},this},i.prototype.stopCallback=function(e,t){return!(-1<(" "+t.className+" ").indexOf(" mousetrap ")||function e(t,r){return null!==t&&t!==n&&(t===r||e(t.parentNode,r))}(t,this.target))&&("INPUT"==t.tagName||"SELECT"==t.tagName||"TEXTAREA"==t.tagName||t.isContentEditable)},i.prototype.handleKey=function(){return this._handleKey.apply(this,arguments)},i.addKeycodes=function(e){for(var t in e)e.hasOwnProperty(t)&&(l[t]=e[t]);s=null},i.init=function(){var e,t=i(n);for(e in t)"_"!==e.charAt(0)&&(i[e]=function(e){return function(){return t[e].apply(t,arguments)}}(e))},i.init(),e.Mousetrap=i,o.exports&&(o.exports=i)}}("undefined"!=typeof window?window:null,"undefined"!=typeof window?document:null)}),C=function e(t){e.initialised||e.init();var r="string"==typeof t?document.getElementById(t):t,n=e.instances.get(r);if(n)return n;e.instances.set(r,this);var i=e.max_tabIndex||0;r.tabIndex=i,e.max_tabIndex=i+1,this.editor_active=!0,this.editor=r,this.blacklist=[],this.autoreplace=!0,this.engine=new x(this),this.temp_cursor={node:null,caret:0},this.editor.addEventListener("keydown",e.key_down,!1),this.editor.addEventListener("keyup",e.key_up,!1),this.editor.addEventListener("focus",function(){e.kb.alt_down=!1},!1),d.config.settings.buttons?this.set_buttons():this.configure("buttons",["settings","controls","symbols"]),this.render(!0),this.deactivate(),this.recompute_locations_paths()};return C.prototype.set_buttons=function(){var e=this.engine.setting("buttons"),t=this;if(e&&0!=e.length&&(this.buttons_div&&(this.buttons_div.parentElement.removeChild(this.buttons_div),delete this.buttons_div),this.buttons_div=document.createElement("div"),this.buttons_div.setAttribute("class","guppy_buttons"),e))for(var r=0;r<e.length;r++)"osk"==e[r]&&d.osk?C.make_button("keyboard",this.buttons_div,function(){d.osk.guppy==t?d.osk.detach(t):d.osk.attach(t)}):"settings"==e[r]?C.make_button("settings",this.buttons_div,function(){d.toggle("settings",t)}):"symbols"==e[r]?C.make_button("symbols",this.buttons_div,function(){d.toggle("symbols",t)}):"controls"==e[r]&&C.make_button("help",this.buttons_div,function(){d.toggle("controls",t)})},C.instances=new Map,C.Doc=y,C.active_guppy=null,C.Symbols=w,C.Mousetrap=_,C.katex=v,C.raw_input_target=null,(C.raw_input=document.createElement("input")).setAttribute("type","text"),C.raw_input.setAttribute("class","guppy-raw"),C.raw_input.style="position:absolute;top:0;left:0;display:none;",C.raw_input.addEventListener("keyup",function(e){var t=C.raw_input_target;if(t)if(13==e.keyCode){t.activate();var r=C.raw_input.value;r=r.normalize();var n=!0,i=!1,a=void 0;try{for(var o,s=r[Symbol.iterator]();!(n=(o=s.next()).done);n=!0){var l=o.value;t.engine.insert_utf8(l.codePointAt(0))}}catch(e){i=!0,a=e}finally{try{!n&&s.return&&s.return()}finally{if(i)throw a}}C.raw_input.value="",C.raw_input.style.display="none",t.render(!0),C.hide_raw_input(),t.engine.fire_event("focus",{focused:!0})}else 27==e.keyCode&&(C.hide_raw_input(),t.engine.fire_event("focus",{focused:!0}))}),C.get_raw_input=function(){var e=C.active_guppy;if(e){var t=(C.raw_input_target=e).editor.getElementsByClassName("cursor")[0].getBoundingClientRect(),r=t.bottom-t.top;C.raw_input.style.top=t.bottom+document.documentElement.scrollTop-r/2+"px",C.raw_input.style.left=t.left+document.documentElement.scrollLeft+"px",C.raw_input.style.display="block",C.raw_input.focus(),C.OSK&&C.OSK.detach()}},C.hide_raw_input=function(){C.raw_input_target=null,C.raw_input.style.display="none"},C.make_button=function(e,t,r){var n=document.createElement("div");return n.setAttribute("class","guppy-button "+e),t.appendChild(n),r&&n.addEventListener("mouseup",function(e){return r(e),null!=e.cancelBubble&&(e.cancelBubble=!0),e.stopPropagation&&e.stopPropagation(),e.preventDefault(),!1},!1),n},C.add_global_symbol=function(e,t,r){r&&(t=w.make_template_symbol(r,e,t)),w.symbols[e]=JSON.parse(JSON.stringify(t));var n=!0,i=!1,a=void 0;try{for(var o,s=C.instances[Symbol.iterator]();!(n=(o=s.next()).done);n=!0){b(o.value,2)[1].engine.symbols[e]=JSON.parse(JSON.stringify(t))}}catch(e){i=!0,a=e}finally{try{!n&&s.return&&s.return()}finally{if(i)throw a}}},C.add_template=function(e,t){w.templates[e]=JSON.parse(JSON.stringify(t))},C.remove_global_symbol=function(e){if(w.symbols[e]){delete w.symbols[e];var t=!0,r=!1,n=void 0;try{for(var i,a=C.instances[Symbol.iterator]();!(t=(i=a.next()).done);t=!0){var o=b(i.value,2)[1];o.engine.symbols[e]&&delete o.engine.symbols[e]}}catch(e){r=!0,n=e}finally{try{!t&&a.return&&a.return()}finally{if(r)throw n}}}},C.configure=function(e,t){if(e in d.settings_options&&-1==d.settings_options[e].indexOf(t))throw"Valid values for "+e+" are 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a=n[i];if("mstyle"!=a.nodeName&&(0!=(r=a.getBoundingClientRect()).top||0!=r.bottom||0!=r.left||0!=r.right))for(var o=a.classList,s=0;s<o.length;s++)if(0==o[s].indexOf("guppy_loc")){e.push({path:o[s],top:r.top,bottom:r.bottom,left:r.left,right:r.right,mid_x:(r.left+r.right)/2,mid_y:(r.bottom+r.top)/2,blank:0<=(" "+a.className+" ").indexOf(" guppy_blank ")});break}}this.boxes=e}},C.get_loc=function(e,t,r,n){var i,a=C.active_guppy,o=-1,s=0,l="",h=null,u=null;if(a.editor.getElementsByClassName("katex")[0]){if(r)var c=S.path_to(r),p=parseInt(c.substring(c.lastIndexOf("e")+1));var d=a.boxes;if(d){if(r){c=c.replace(/e[0-9]+$/,"e");for(var m=[],f=0;f<d.length;f++)if("all"!=d[f].path){var g=d[f].path.substring(0,d[f].path.lastIndexOf("_"));(g=g.replace(/e[0-9]+$/,"e"))==c&&m.push(d[f])}d=m}if(d){for(var v=0;v<d.length;v++){var y=d[v];if("all"!=y.path){var b=Math.max(y.left-e,e-y.right,0),x=Math.max(y.top-t,t-y.bottom,0),_=Math.sqrt(b*b+x*x);(-1==o||_<o)&&(o=_,s=e-y.mid_x,h=y)}else h||(h={path:"guppy_loc_m_e1_0"})}g=(g=(g=h.path.substring("guppy_loc".length)).replace(/_/g,"/")).replace(/([0-9]+)(?=.*?\/)/g,"[$1]"),i=a.engine.doc.xpath_node(g.substring(0,g.lastIndexOf("/")),a.engine.doc.root()),u=parseInt(g.substring(g.lastIndexOf("/")+1)),0<s&&!h.blank&&u++;var w={current:i,caret:u,pos:l};if(r&&h){var k=parseInt(h.path.substring(h.path.lastIndexOf("e")+1,h.path.lastIndexOf("_")));k<p?l="left":p<k?l="right":u<n?l="left":n<u&&(l="right"),w.pos=l||"none"}return w}}}},C.mouse_up=function(){C.kb.is_mouse_down=!1;var e=C.active_guppy;e&&e.render(!0)},C.touch_start=function(e){for(var t=e.changedTouches[0],r=t.target;null!=r;){if(C.instances.get(r)){e.preventDefault();var n=C.active_guppy,i=!0,a=!1,o=void 0;try{for(var s,l=C.instances[Symbol.iterator]();!(i=(s=l.next()).done);i=!0){var h=b(s.value,2),u=h[0],c=h[1];u!==r?c.deactivate():c.activate()}}catch(e){a=!0,o=e}finally{try{!i&&l.return&&l.return()}finally{if(a)throw o}}var p=C.active_guppy,d=C.active_guppy.engine;if(p.space_caret=0,n==p){var m=C.get_loc(t.clientX,t.clientY);if(!m)return;d.current=m.current,d.caret=m.caret,d.sel_status=x.SEL_NONE,p.render(!0)}return}if(r.classList&&r.classList.contains("guppy_osk"))return;r=r.parentNode}},C.touch_move=function(e){var t=e.changedTouches[0],r=C.active_guppy;if(r)for(var n=t.target;null!=n;){C.instances.get(n)==r&&(r.select_to(t.clientX,t.clientY,!0),r.render(r.is_changed())),n=n.parentNode}},C.mouse_down=function(e){var etc=e.target.getAttribute("class");if(etc&&etc.startsWith("oppia-osk-btn"))return;if("guppy-button"!=etc){var t=e.target;for(C.kb.is_mouse_down=!0;null!=t;){if(C.instances.get(t)){e.preventDefault();var r=C.active_guppy,n=!0,i=!1,a=void 0;try{for(var o,s=C.instances[Symbol.iterator]();!(n=(o=s.next()).done);n=!0){var l=b(o.value,2),h=l[0],u=l[1];h!==t?u.deactivate():u.activate()}}catch(e){i=!0,a=e}finally{try{!n&&s.return&&s.return()}finally{if(i)throw a}}var c=C.active_guppy,p=C.active_guppy.engine;if(c.space_caret=0,r==c){if(e.shiftKey)c.select_to(e.clientX,e.clientY,!0);else{var d=C.get_loc(e.clientX,e.clientY);if(!d)return;p.current=d.current,p.caret=d.caret,p.sel_status=x.SEL_NONE}c.render(!0)}return}if(t.classList&&t.classList.contains("guppy_osk"))return;t=t.parentNode}var m=!(C.active_guppy=null),f=!1,g=void 0;try{for(var v,y=C.instances[Symbol.iterator]();!(m=(v=y.next()).done);m=!0){b(v.value,2)[1].deactivate()}}catch(e){f=!0,g=e}finally{try{!m&&y.return&&y.return()}finally{if(f)throw g}}}},C.mouse_move=function(e){var t=C.active_guppy;if(t)if(C.kb.is_mouse_down)t.select_to(e.clientX,e.clientY,!0),t.render(t.is_changed());else{var r=t.editor.getBoundingClientRect();if(e.clientX<r.left||e.clientX>r.right||e.clientY>r.bottom||e.clientY<r.top)t.temp_cursor={node:null,caret:0};else{var n=C.get_loc(e.clientX,e.clientY);if(!n)return;t.temp_cursor={node:n.current,caret:n.caret}}t.render(t.is_changed())}},C.prototype.select_to=function(e,t,r){var n=this.engine.caret,i=this.engine.current;this.engine.sel_status==x.SEL_CURSOR_AT_START?(i=this.engine.sel_end.node,n=this.engine.sel_end.caret):this.engine.sel_status==x.SEL_CURSOR_AT_END&&(i=this.engine.sel_start.node,n=this.engine.sel_start.caret);var a=C.get_loc(e,t,i,n);a&&this.engine.select_to(a,i,n,r)},window.addEventListener("touchstart",C.touch_start,!0),window.addEventListener("touchmove",C.touch_move,!0),window.addEventListener("mousedown",C.mouse_down,!0),window.addEventListener("mouseup",C.mouse_up,!0),window.addEventListener("mousemove",C.mouse_move,!1),C.prototype.render_node=function(e){var t="";if("render"!=e)return t=this.engine.get_content(e);var r=this.engine.doc.root();return this.engine.add_paths(r,"m"),this.engine.temp_cursor=this.temp_cursor,this.engine.add_classes_cursors(r),this.engine.current.setAttribute("current","yes"),this.temp_cursor.node&&this.temp_cursor.node.setAttribute("temp","yes"),t=this.engine.get_content("latex",!0),this.engine.remove_cursors_classes(r),t=t.replace(new RegExp("&amp;","g"),"&")},C.prototype.render=function(e){if(!this.editor_active&&this.engine.doc.is_blank())return v.render(this.engine.setting("empty_content"),this.editor),void(this.buttons_div&&this.editor.appendChild(this.buttons_div));var t=this.render_node("render");v.render(t,this.editor),this.buttons_div&&this.editor.appendChild(this.buttons_div),e&&this.recompute_locations_paths()},C.prototype.latex=function(){return this.engine.get_content("latex")},C.prototype.xml=function(){return this.engine.get_content("xml")},C.prototype.syntax_tree=function(){return this.engine.get_content("ast")},C.prototype.equations=function(){return this.engine.get_content("eqns")},C.prototype.text=function(){return this.engine.get_content("text")},C.prototype.asciimath=function(){return this.engine.get_content("asciimath")},C.prototype.doc=function(){return this.engine.doc},C.prototype.func=function(e){var t=this.engine.get_content("function",e),r=t.function;return r.vars=t.vars,r},C.prototype.evaluate=function(e){return this.engine.doc.evaluate(e)},C.prototype.symbols_used=function(e){return this.engine.doc.get_symbols(e)},C.prototype.vars=function(){return this.engine.get_content("function").vars},C.prototype.import_text=function(e){return this.engine.import_text(e)},C.prototype.import_latex=function(e){return this.engine.import_latex(e)},C.prototype.import_xml=function(e){return this.engine.set_content(e)},C.prototype.import_syntax_tree=function(e){return this.engine.import_ast(e)},C.prototype.activate=function(){var e=!this.editor_active;(C.active_guppy=this).editor_active=!0,this.editor.className=this.editor.className.replace(new RegExp("(\\s|^)guppy_inactive(\\s|$)")," guppy_active "),this.editor.focus(),this.render(!0),e&&this.engine.fire_event("focus",{focused:!0}),C.raw_input_target==this&&C.hide_raw_input()},C.prototype.deactivate=function(){var e=this.editor_active;this.editor_active=!1;var t=new RegExp("(?:\\s|^)guppy_active(?:\\s|$)"),r=new RegExp("(?:\\s|^)guppy_inactive(?:\\s|$)");this.editor.className.match(t)?this.editor.className=this.editor.className.replace(t," guppy_inactive "):this.editor.className.match(r)||(this.editor.className+=" guppy_inactive "),C.kb.shift_down=!1,C.kb.ctrl_down=!1,C.kb.alt_down=!1,d.hide_all(),C.hide_raw_input(),e&&(this.render(),this.engine.fire_event("focus",{focused:!1}))},C.kb=new p,C.register_keyboard_handlers=function(){var e,t;for(t in _.addKeycodes({173:"-"}),w.symbols){var r=w.symbols[t];if(r.keys)for(e=0;e<r.keys.length;e++)C.kb.k_syms[r.keys[e]]=r.attrs.type}for(e in C.kb.k_chars)_.bind(e,function(e){return function(){return!C.active_guppy||(C.active_guppy.temp_cursor.node=null,S.is_text(C.active_guppy.engine.current)&&C.kb.k_text[e]?C.active_guppy.engine.insert_string(C.kb.k_text[e]):C.active_guppy.engine.insert_string(C.kb.k_chars[e]),C.active_guppy.render(!0),!1)}}(e));for(e in C.kb.k_syms)_.bind(e,function(e){return function(){return!C.active_guppy||(C.active_guppy.temp_cursor.node=null,S.is_text(C.active_guppy.engine.current)?C.kb.k_text[e]&&C.active_guppy.engine.insert_string(C.kb.k_text[e]):(C.active_guppy.engine.space_caret=0,C.active_guppy.engine.insert_symbol(w.lookup_type(C.kb.k_syms[e]))),C.active_guppy.render(!0),!1)}}(e));for(e in C.kb.k_controls)_.bind(e,function(e){return function(){return!C.active_guppy||(S.is_text(C.active_guppy.engine.current)&&C.kb.k_text[e]?C.active_guppy.engine.insert_string(C.kb.k_text[e]):(C.active_guppy.engine.space_caret=0,C.active_guppy.engine[C.kb.k_controls[e]](),C.active_guppy.temp_cursor.node=null),C.active_guppy.render(["up","down","right","left","home","end","sel_left","sel_right"].indexOf(e)<0),!1)}}(e));for(e in C.kb.k_text)C.kb.k_chars[e]||C.kb.k_syms[e]||C.kb.k_controls[e]||_.bind(e,function(e){return function(){return!C.active_guppy||(C.active_guppy.temp_cursor.node=null,S.is_text(C.active_guppy.engine.current)&&C.active_guppy.engine.insert_string(C.kb.k_text[e]),C.active_guppy.render(!0),!1)}}(e));_.bind(C.kb.k_raw,function(){return!C.active_guppy||(C.get_raw_input(),!1)})},C.initialised=!1,C.init=function(){C.initialised||(d.init(w.symbols),C.register_keyboard_handlers(),document.body.appendChild(C.raw_input),C.initialised=!0)},C}();module.exports=Guppy;
diff --git a/sym/symbols.json b/sym/symbols.json
index 084e5fe6..587416a1 100644
--- a/sym/symbols.json
+++ b/sym/symbols.json
@@ -155,7 +155,7 @@
     {"output":{
         "latex":"\\dfrac{{$1}}{{$2}}",
         "small_latex":"\\frac{{$1}}{{$2}}",
-	"asciimath":"({$1})/({$2})"},
+	"asciimath":"{$1}/{$2}"},
      "input":1,
      "keys":["/"],
      "attrs":{