An experimental MathJax plugin for TiddlyWiki version 5. As Martin says, the implementation is a bit of a hack but may be useful until we have a better alternative.
http://mathjax-tw5.kantorsite.net
Welcome. I have created plugin for TiddlyWiki 5 which allows you to use MathJax (math in TeX and MathML) inside TiddlyWiki 5. It's unofficial plugin and it doesn't follow general policy of TiddlyWiki as stand-alone solution but it works. So you can use it if you want.