$2^2+7^2$
$-3x^2+13x+30$
$4+\sqrt{3r+10}=0$
$\frac{3}{\left(2-4x\right)}$
$\lim_{x\to-\infty}\left(\frac{2x-1}{1+2x}\right)$
$4-\:-2\:-2\:5\:$
$\left(3x-4\right)\left(x+2\right)$
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