$\left(2r\right)^2$
$8r+10-11s-7-18s$
$49g^2+56gm+16m^2$
$\left(-\frac{2}{5}h-7\right)\left(\frac{2}{5}h+7\right)$
$\lim_{x\to\infty}\:\left(x^3-2\right)$
$896,045-67,276$
$1+a^2^2^2^2^2-a^2^2$
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