$\frac{dy}{dx}=2-y-y^2$
$-7=\frac{x}{-7}$
$2\infty2$
$\csc\left(x\right)-\tan\left(x\right)\cos\left(x\right)$
$n^2-2\left(13n+35\right)-\left(n-13\right)^2$
$x-20<50$
$\left(14y^2+15\right)-\left(-9y^4-7y^2+15\right)$
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