$3+7w-1+7w-2+w$
$\frac{4x+2\le x\:}{6x-5<x+1}$
$\frac{dy}{dx}\left(2-\frac{100}{\left(x+7\right)^2}=y\right)$
$n+4+9+5n$
$\left(x+5\right)\left(x+2\right)-3\left(4x-3\right)=\left(5-x\right)$
$\sqrt{2^n}$
$\left(1+5x^2\right)\left(x-x^2\right)$
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