Negate an equation:

[DrD]

compsystems, thanks for trying. Unfortunately, your procedure doesn't meet the objective: "-c=x+y"

In general, I was hoping to find a more direct way to convert between a string object version of a function, and the function object, (and retain the result as a string object). For example, this works as specified, but is quite cumbersome:

STRING(-CAS("left(CAS(L0(3)))")=simplify(-CAS("right(CAS(L0(3)))")));

Better ways and means probably exist, and I just haven't stumbled upon them so far. Somehow, it seems like there would be a built in command for interacting with functions as string objects. I would appreciate other ideas, since I seem to encounter this problem quite a bit. Working with a "string function" can be a way to get around problems resulting from undesired evaluation steps; in programs, for example.