<p>The only time I've had to implement something like this was with a Moodle site where we made use of <a href="http://www.forkosh.dreamhost.com/source_mimetex.html" rel="nofollow">mimetex</a> although this appears to have been superseded by <a href="http://www.forkosh.com/mathtex.html" rel="nofollow">mathtex</a> which I haven't used. <a href="http://nrich.maths.org/public/" rel="nofollow">NRich</a> make extensive use of <a href="http://www.math.union.edu/~dpvc/jsMath/" rel="nofollow">jsMath</a> very successfully and it probably isn't going to be as much of a nightmare to get working as mimetex was.</p>
