Question

Multiply
n(2n^2+n+1)

Answer 1

http://www.wolframalpha.com/input/?i=Multiply+n%282n%5E2%2Bn%2B1%29

Answer 2

This might help

Answer 3

\[n\left(2n^2+n+1\right)=2n^3+n^2+n\]\[2n^2\cdot n+n\cdot n+1\cdot n=\ldots\,?\]