$3x^2-7x-20$
$4xydx+\left(2x^2+1\right)dy=0$
$\frac{dy}{dx}=\left(-2u\cdot tan\left(x\right)-1\right)$
$-y+9c+9+10c+9-1$
$\int\sqrt{\cot^2\left(x\right)+1}dx$
$\left(3a^2b+2a\right)\left(3a^2+2a\right)$
$a^6-144$
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