$\frac{2-2x}{x-3}\ge2$
$-18\cdot13$
$\frac{m^2-1}{m^2+m-2}$
$\frac{dy}{dx}\left(e^{y^2}=x^3-2y\right)$
$3x^2-27y^2$
$5+\sqrt{36}x\:\sqrt{16}+3$
$4r^2-12r+7$
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