$-2x^3-2x$
$y^4-6y^2z+9z^2$
$70>y+40$
$\frac{d}{dx}\:4^{6x}$
$2x-3<x^2-2x$
$\left(5m^5-9n^2\right)^2$
$\frac{8x^3y^{-5}}{4x^{-1}y^2}$
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