Which expression is equivalent to (N^2+7n-2)(-3n+4)

3n^3+17n^2-34n+8

3n^3+23n^2+22n-8

-3n^3+23n^2-22n+8

-3n^3-17n^2+34n-8

-3n^3 - 17n^2 + 34n - 8