Need to define arithmetic functions and evaluate with different values
 

I have a need to be able to interactively enter different arithmetic functions that reference user-defined variables, and then interactively evaluate those functions with different values for those variables.

I didn't see a way to do this with gcalctool. It looks like qalculate might do this for me, but I can't figure out how it works. The docs for it are a little rough.

Sounds like LISP with Slime would be killer for this...APL would also be great but is NOT FUN without an APL keyboard.

Yeah, that was pretty silly of me. I already had what I needed. Ordinary lisp interaction mode works fine. Good to write defuns again. :)