$-\frac{3}{5}x+2>-1$
$\left(\frac{x}{2}-y\right)\left(\frac{x}{2}-y\right)$
$4m^2-12n^2$
$\left(-82\right)\cdot\left(-42\right)$
$\lim_{x\to-1}\left(\frac{\sqrt{x}-3}{9-x}\right)$
$\lim_{x\to0}\left(\sqrt{\frac{n}{9n+1}}\right)$
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