Find the coefficient of z in the product (-3z^2 - 7z + 4)(6z^2 + 6z - 1).
(–-3z2 – 7z + 4)(6z2 + 6z – 1) —> + 7z
(–-3z2 – 7z + 4)(6z2 + 6z – 1) —> +24z
total +31z
.