Multiply. Give you answer in standard form

Question

(2n squared + 5n + 4)(2n-4)

Answer 1

4n^3 - 8n^2 + 10n^2 - 20n + 8n - 16

Simplified:
4n^3 + 2n^2 - 12n - 16

Standard form:
4n^3 + 2n^2 - 12n - 16