Workaround for reddit's formatting

[emichael]

Reddit thinks ^ means superscript and surrounds text in ^{. This needs to recognize when ^ should have been in a $\LaTeX$ fragment and undo the markdown.}

[ysulyma]

The officially sanctioned /r/math way around this is to enclose the code in backticks to protect special characters, but this also breaks TeX All The Things: it doesn't apply MathJax to things in <code> elements