In my paper I am writing a couple of times
We contribute ...
First, we contribute a new definition for the problem and then a formula for xy.
My editor has removed all the "contribute" and replaced them with the verb "present". I have also seen such sentences with "introduce" or "propose".
I chose "contribute", because I wanted to make clear what our new contributions to the topic are what is not. E.g. I am repeating some formulas from other papers.
Is "we contribute ..." bad style and if so, why?