$3\:\cdot\:-3\:\cdot\:4$
$\lim_{x\to-1}\left(\frac{x-2}{x+4}\right)$
$6-2y=12$
$\left(-e^{-\infty}\infty^2+2\left(-e^{-\infty}\infty-e^{\infty}\right)\right)-\left(-e^{-2}2^2+2\left(-e^{-2}2-e^2\right)\right)$
$2x<-8$
$2\sqrt{2}-\sqrt{8}\arctan\left(\frac{\sqrt{2}}{\sqrt[4]{4}}\right)$
$158^2$
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