$-6+1-8\left(-2\right)-4$
$\left(5+n^2\right)^3$
$\frac{dy}{dx}=4xy^2\:-\:4x\:+\:2y^2\:-\:2$
$x^2+3x-2>0$
$x^2-50x-336$
$2x^2+2x+x^2+2$
$\left(s^{2\:}+2s-3\right)$
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