$\lim_{x\to3}\left(\frac{\sqrt{x\:+\:1\:\:-\:\sqrt{2}}}{x\:-\:3}\right)$
$x^2-8x\le0$
$\lim_{x\to\infty}\left(\frac{1}{x-4}-\frac{1}{\ln\left(x-3\right)}\right)$
$\left(x^{3}y^{6}\right)^{6}$
$-\left(+4-7-9\right)+\left(-4+5-2\right)$
$\left(3+ab^2\right)^2$
$\:2a\:+\:3a\:$
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