simple question i guess



Hi guys,

here's something that i found out a while ago.. but have forgotten

How do i get the structured object for the representation of an expression?

i.e. a: 3+b
toLisp()

[something here]

(MPLUS 3 b)

I believe that's how it looks..?
Also if anyone knows a way to do this whilst staying in maxima.. i'm
using xMaxima if that makes a difference
Peace
Harry