http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS_HTML
In case you don't want or can use the admin panel of Friendica you can activate
http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS_HTML
In case you don't want or can use the admin panel of Friendica you can activate