Math entry on computer question

Hey guys,

I did a bunch of math work in my own personal chicken-scratch that I'd like to type up in a document format. Is there any software out there that will make it easy? I essentially took the Laplace transforms of a bunch of op amp circuits for audio and did a bilinear transform to get a digital filter equivalent, and I want to show the work better than this:

**broken link removed**

Thanks for any help.

See this thread on LaTeX. Also, see this result of a Google search.