Installation: https://asciinema.org/a/sDzwN0bu849hvb1wH8ddw7WPm

Brain-even: https://asciinema.org/a/H9dsrVaCk2WSEPkvKus4H1d0A

Brain-calc: https://asciinema.org/a/tzvx3zIJwAA8UYrFgjrbkOLKV

Brain-gcd: https://asciinema.org/a/G2tg4JSQpjX5oWKv29CNMJK48

Brain-progression: https://asciinema.org/a/dQU95Omz4oCqA4VczNEDr0kRe

Brain-prime: https://asciinema.org/a/L7tnIslxRIfYaA9JXLVjtJeLQ