$-46\:-\:\left(-31\right)$
$4x^244x+121$
$\frac{64}{4x^2}$
$\lim_{x\to5}\left(-2\right)$
$8\left(-7\:+\:3\right)\:-\:2\left(-3\:-\:2\right)$
$\left(-x+1\right)\left(x^2+6x-4\right)$
$16x^3-84x^2-152x+28$
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