$32cz+7ru+4uz+56cr$
$\left(-4-50-75\right)\left(-30+45-5\right)$
$5a^2+15a+12=a^2-a-4$
$\left(25a^2b^3\right)^2$
$8nb2+15nb2+6nb2$
$\frac{d}{dx}x^2+y^2=-1$
$\left(x+2y+4\right)^2$
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