91Ó°ÊÓ

In the following exercises , simplify the expression $\left(4a^{3}b\right)\left(9a^2{b}^6\right)$.

In the following exercises, simplify the equation $ \left(6m^4{n}^3\right)\left(7m{n}^5\right)$.

In the following exercises , simplify the equation $ −5m\left(m^2 + 3m − 18\right) $.

In the following exercises, simplify the equation $5q^3\left(q^2 − 2q + 6\right)$.

In the following exercises , simplify the equation $\left(s − 7\right)\left(s + 9\right)$.

In the following exercises, simplify the equation $\left(y^2 − 2y\right)\left(y + 1\right)$.

In the following exercises , simplify the equation $\left(5x − y\right)\left(x − 4\right)$.

In the following exercises , simplify the equation $\left(6k − 1\right)\left(k^2 + 2k − 4\right)$.

In the following exercises, add or subtract the monomials.

$5u^2+4v^2-6u^2+12a+8b$

In the following exercises, simplify the equation $(11−b)(11+b)$.