$\frac{dy}{dx}+2xy=xe^{-x^2}y^3$
$\int\left(\frac{5x-2}{9+x^2}\right)dx$
$3x-8=x^{2}-3$
$16x^2\:-48x+36$
$\left(6x^2-xm^2\right)\left(xm^2+6x^2\right)$
$3x^2-18x+20$
$t^2-12t+32$
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