It's called LateX, I actually looked at what other people were posting (you can click on it to see how it was done) and just examining it and seeing what comes out. (i'd never used it until I started posting on here btw)

You use "[tex]" "[ /math]" and type stuff in between.

LaTeX Equation Editor - SITMO

that link also allowed me to test different things before I posted. Also talking to people there's a section devoted to helping people with latex, otherwise I just google something like "latex integrals."

so like if you want a fraction you type in \frac{a}{b} and that'll give you a/b.

\int gives you an integral

\int_b^a dx gives you an integral with limits b being the lower limit, a being the upper limit So the "_a" gives you subscript and the "^b" gives you superscript.

So on and so forth.

Have you thought about rewriting the denominator?

Least that's my initial impression. I think the following might be more helpful.