$32+56$
$-2-\left(\left(-8-11\right)-\left(-8-\left(-1\right)\right)\right)$
$5n\:-\:2\left(n-3\right)$
$\lim_{x\to\infty}\left(\sqrt{x+7}-\sqrt{x-7}\right)$
$\log_a\left(\frac{xy^3}{z^2}\right)$
$-7m-8m$
$3\left(7\right)\cdot4\left(11\right)$
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