$\cot\left(a\right)+\tan\left(a\right)\cos\left(a\right)$
$\left(2xy^{2+3p^{2r}}\right)\left(2xy^2+3pr\right)$
$\frac{dy}{dx}=e^{5y+4x}$
$\frac{2x^3+3x-2x^2+2}{x-1}$
$x^2+11x+30\le0$
$3\cos^2\left(x\right)+7\cos\left(x\right)-6$
$2x-1<x+7$
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