$r^2-4r+12=0$
$x^2+14x\le0$
$57=\left(n+2\right).\left(n+1\right)$
$4\sqrt{625x^{12}y^8}$
$5^217$
$\left(3a-3b\right)-\left(b-c\right)$
$\frac{d}{dx}8xe^{x^2-1}$
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