Question

what is the product of each equation?
$\left(3a^{2}b^{4}\right)\left(-8ab^{3}\right)$
$\left(3a^{2}b^{7}\right)\left(5a^{3}b^{8}\right)$
$\left(-2d^{2}+s\right)\left(5d^{2}-6s\right)$
$\left(3x-6\right)\left(2x^{2}-7x+1\right)$)
$\left(7x^{2}y^{3}\right)\left(3x^{5}y^{8}\right)$
$\left(y^{2}+3y+7\right)\left(8y^{2}+y+1\right)$
$\left(4s+2\right)\left(5s^{2}+10s+3\right)$