$5\left(3c-6d+6\right)$
$12x^2+28x-24$
$3x^2-4x+2=0$
$\frac{1+\cos\left(x\right)}{\sin\left(x\right)}+\frac{\sin\left(x\right)}{1+\cos\left(x\right)}=2\sin\left(x\right)$
$4x^3y^3+108$
$-\frac{1}{2}\cdot100$
$9y^2-76y+53$
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