$\left(x+a\left(y+b\right)\right)$
$-2x+12x+40$
$4x^6y^2+12x^3-4xy$
$p^2-12p-28$
$\left(-\frac{4}{5}a^2b\right)\left(-ab\right)$
$\frac{3x}{5}+7=2x$
$b-5b$
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