$\lim_{x\to-1}\frac{\sqrt{x+5}-2}{x-1}$
$\int\frac{x}{\sqrt{16+6x-x^2}}dx$
$-7+\left(5-\left(3-\left(2-8\right)\right)\right)$
$-3-\left[\left|-2+5-4\right|-\left(-1-2\right)\right]$
$x^{2}+2x-15>0$
$5x\:+\:2\:<\:2x\:$
$-x-4x-7$
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