This patch applies on top of the mathstodon branch maintained by christianp. It's only useful if you have something rendering LaTeX inside status content. The mathstodon branch uses MathJax for this.
You need a copy of MathJax 3 in the folder public/MathJax.
These patches are based off Mastodon v2.7.1. They will probably need some work to apply to future releases.
mathjax.diff adds MathJax to render LaTeX. You need a copy of MathJax under the URL /MathJax.
Write inline maths between \( and \), and display-mode maths between \[ and \].
autolatex.diff adds automatic replacement of some LaTeX with unicode equivalents in the toot compose box. It only applies to text not within LaTeX delimiters, so doesn't interfere with MathJax.