$\left(56a+2b\right)^2$
$\frac{d}{dx}3x-5$
$15-2x=x^2$
$3x+8\le x+20$
$\left(8-2\right)-\left(-5+2\right)$
$200-24+81$
$\lim_{x\to\infty}\left(\frac{n}{\sqrt{n^2+n}}\right)$
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