$n^2-3n-238=0$
$\frac{x^3y^{-2}}{z^2}$
$xydx\:-\sqrt{x^2-4}dy=0$
$7x-5\ge23$
$\frac{4\pi}{5m}\cdot\frac{4\pi}{5m}$
$\left(125x^6+8\right)$
$\left(6x^4\right)\left(-6x+3y^4\right)$
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