What program are you writing the paper with?
As Manoel said, word has a very basic equation editor built in. I don't like using it very much as it is clunky to me.
OpenOffice has a much better equation editor, in my opinion.
LaTeX is often used for many journals and such and has a very powerful equation parser. It generates the equations for FIRSTwiki, like Jamie said. It's something that's well worth learning if you plan to do more of this type of thing. Ian Mackenzie used LaTeX with a few equations for his whitepaper on 1114's drive train:
http://www.chiefdelphi.com/forums/pa...le&paperid=354
Note that all three solutions require that you use their program to write your paper (with the possible exception of LaTeX), which is why my first question is what you are using currently.