Any web sites that do Laplace transforms and their inverses?

Factual Questions
1

I need to do some Laplace transforms. I just know that Mathematica and Maple and packages like that would be able to do it, but getting into that whole deal for this one application seems excessive.

Are there any web sites where you can enter an expression and get its transform? And maybe even vice versa?

BTW a Laplace transform is a symbolic manipulation that converts an expression in terms of time t into another expression in terms of frequency s (where s is a complex variable). I know about Fourier transforms, which convert from the time domain into the frequency domain (actually they convert from any domain into the inverse of that domain). But whereas Fourier transforms act on data - lists of numbers - the Laplace transform acts on expressions - or formulae or equations, you might say. It’s a sort of trick for taking the “differential” out of “differential equations”.

Thanks!

2

I dunno about websites, but I have Maple 8. If you tell me what you want, I can plug it in for you and send you off the results. Note: I dunno shit from shinola when it comes to Laplace transforms, so you’ll have to walk me through it some, but I’ll give it a shot if nothing better comes along.