$\left(x^{-2}-x^{-3}\right)\left(3x^{-1}+4x^{-4}\right)$
$\left(-36\right)\cdot\left(-35\right)$
$ad^2-28d+49=\left(2d-7\right)^2$
$6\left(-9k-10\right)$
$\frac{4x^3+2x^2}{x+3}$
$x=3,\:y=-2,\:z=1,\:w=-2$
$\left(3x-\:\frac{1}{2}\right)\left(-\frac{1}{2}+3x\right)$
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