"MathJax help" in https://cs.stackexchange.com/editing-help#latex leads to https://legacy-www.math.harvard.edu/texman/, which doesn't actually talk about MathJax. I believe [this](https://math.meta.stackexchange.com/questions/5020/mathjax-basic-tutorial-and-quick-reference) is a much better link.

(One of the moderators on https://meta.stackexchange.com/ suggested to create a question here, and then "site mods can escalate issues from their Meta site by adding the [status-review] tag")