$\lim_{x\to-1}\left(\frac{x+1}{2-\sqrt{3-x}}\right)$
$16\left(12\right)+31$
$5=\left(-8\right)$
$2x-7=-3x+18$
$-8m>-40$
$-9-6m+17-8m$
$9x^2+36-36y$
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