For example, if I have,
e = a0 + a1 x + a2 (-x + x^2) + a3(-x + x^3) + .... + an (-x + x^n)
how do I find and list
{x, (-x + x^2), ..., (-x + x^n)}
?
I tried
Coefficient[e, a[i], {i, 0, 10}]`
where, n = 10
. It shows some error. Please help.