$\int\left(7x\arctan\left(x\right)\right)dx$
$\left(d+4\right)\left(d+2\right)y=0$
$\left(6x^2+7x\right)^4$
$2x\left(\frac{-2}{\sqrt{6\:}}y+\frac{1}{\sqrt{3\:}}z\right)^2$
$sen^3a\:cosa\:+\cos^3a\:sena$
$\frac{d^2}{dx^2}\left(2x+7\right)^4$
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