$\int\sqrt{x^2-x+2}dx$
$978.5-275.468$
$x-2x^2$
$-4x\:+\:12\:=\:2x\:+\:18$
$\frac{2.252^{21}}{2^{17}}$
$\left(a+1\right)\cdot\left(a+6\right)$
$2x^2-7x-5\le0$
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