Is there a way to make python transform [(x + 2)**3] into [x**3 + 6*x**2 + 12*x + 8] ?

Answer 1

you could have waited for n answer to your original post instead of reposting. this does not give anything else on the subject.
you want the result x of the first calculation to be x in the second function?
I gave you the code you need to achieve this into your original post

Answer 2

I want to expand the polynomial