MathML

MathML is an XML-based format for displaying mathematical formulas, standardized by the W3C Math Working Group. It is supported by most modern browsers.

MathML is a low-level description not intended to be written by humans. MathJax (which also supports MathML polyfills for browsers that support it) is a popular way to generate MathML in web pages from LaTeX source.

Links

 * Official site
 * Math Tools from the W3C wiki
 * MDN on MathML