Extension:MathJax

Follow the instructions at the MathJax website http://docs.mathjax.org/en/latest/configuration.html to install MathJax on your server. (1) Expand the full MathJax download into a folder http://mysite.com/MathJax/ (2) add the code required, with the proper path, inside at the very top of LocalSettings.php before the <?php -- both the script to load MathJax and the configuration script,which goes before the load script, as instructed at mathjax.com. Then LaTex or any other math language supported by MathJax will be transcribed in any page on the website if between the proper delimiters, e.g. $ ... $. This works for the latest MediaWiki version 1.30 on a shared host.