$6n^2m^2\left(6nm-n^3m^2+3\right)$
$\frac{cos\left(90^{\circ\:\:}+x\right)}{sen\left(180^{\circ\:\:\:}-x\right)}$
$\frac{dy}{dx}+x^2=x^2y^2$
$2\left(3\right)+3\left(5\right)$
$1-\left(-55\right)$
$\int x\cdot\frac{1}{secx}dx$
$45x^2-500$
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