CAS: simplify terms seperately?

[wsprague]

Hi all,

Is there a way to apply simplify() individually to terms separated by a plus?

For example:

((c*r*v0+c*r*va)*e^(-t/(r*c)))/(c*r) + va

I want the RC to be canceled in the left term:

(v0+va)*e^(-t/(r*c)) + va

But simplify gives mr something weird, maybe due to prefering exp() with a positive value:

(v0 + va*exp(t/c*r) - va) / exp(t/c*r)

I would be ok with highlighting the part I want simplified and pressing a button, though I would prefer something with syntax if possible.

Also, most times I would prefer exp( - f(t) ) to be left with a negative value in the numerator, rather than rewritten as 1/exp(f(t)). If there is a flag or a way to do that, that would be awesome.

(I am working through Laplace transforms in a circuit book, if that helps with context. )

Thanks Prof. Parisse and HP for a great product, and forgive me my poor explanation.