$\int\left(x^{-2}\right)dx$
$-11+x\le-6$
$\lim_{r\to\infty}\left(\frac{-2gm}{a^2+r^2}\right)$
$=2\left(\left(x+1\right)\sqrt{x+2}\right)$
$\left(3x^3y^2+2xy-5\right)\left(x^2y^2\right)$
$\int\frac{2x-1}{\left(x-1\right)^2\left(x+1\right)}dx$
$x^2-13x-140$
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