feat: add tip to disable mathjax processing for an element

[navinkarkera]

Adds a tip about disabling MathJax rendering for a problem to allow users to display raw functions/expressions containing \ followed by a [ and \ followed by ].

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[tecoholic]

@navinkarkera 👍

• I tested this: Tested the documented solution preserves the raw text without MathJax interpretation
• I read through the code - NA
• I checked for accessibility issues
• Includes documentation

[tecoholic]

@jristau1984 Can you help to find the right person to review this?

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