Rod to me:

The math plug-in is more of a built-in feature:
http://wordpress.com/blog/2007/02/17/math-for-the-masses
http://faq.wordpress.com/2007/02/18/can-i-put-math-or-equations-in-my-posts

I did not install any plug-in. Since last February [2007], WordPress.com allows math typing in Latex. Midas Oracle should allow Latex typesetting without any plug-in. Just try to write $latex LaTeX$ in a post, and see if it works

Midas Oracle runs WordPress.org (as opposed to being web-hosted by WordPress.com). I will have to search for a plugin.

External Link: Using Latex in WordPress – Sounds more complex than just installing a plugin&#8230- I&#8217-m investigating&#8230- Don&#8217-t hold your breath&#8230-