LaTeX is a math environment that makes pretty equations on the web. I need to know exactly what you're wanting.
For example:
\sqrt(number) displays the formula for the square root of the number
\frac {numerator} {denominator} displays the fraction with the specified numerator (top number) and denominator (bottom number).
The third thing is calculus related. Basically, that means that the area under the curve created by graphing that function (the big x4(1-x)4 over 1+x2 fraction thing) from x=0 to x=1 is approximately 22/7 - pi. It's called an integral.
This is just one example that I can code into your PHP source. I will do it for you if tell me exactly what you need.