MathJax is a JavaScript engine for displaying mathematics.

MathJax is a JavaScript library that is used to display mathematical equations on the Stack Exchange sites where it is activated. You can ask questions about the use of MathJax on Puzzling Stack Exchange here.

Questions about MathJax itself are off-topic here — ask only questions about its use on Stack Exchange. If you're making a website and have trouble with MathJax, try Stack Overflow. If you have trouble with MathJax rendering in your web browser, try Super User.

Tutorials

Copied from: http://meta.stackexchange.com/tags/mathjax/info