Alexander has written a hack that lets us use Latex to write equations.
Usage is fairly complex but there is a nice tutorial here:
http://www.forkosh.com/mimetextutorial.html
Use the following syntax:
Code:
[latex]f(x)=int_{-\infty}^x e^{-t^2}dt[/latex]
...which yields
=int_{-\infty}^x e^{-t^2}dt)