$45y-9y+2$
$\frac{x^3-12x+15}{x-3}$
$\left(ac+ad\right)^2$
$\left(x+1\right)^2\left(x-2\right)\left(x+2\right)$
$\left(7x^2+3x+9\right)+\left(5x^2-x+6\right)$
$-4cd^4;\:c=-3;\:d=2$
$81-6g=3g$
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