$\frac{sen^3\left(x\right)+cos^3\left(x\right)}{sen\left(x\right)+cos\:\left(x\right)}=1-sen\left(x\right)cos\left(x\right)$
$\sin\left(x\right)-2\sin\left(x\right)\cos\left(x\right)$
$\int\left(\cot^2\left(2x\right)+\cot^4\left(2x\right)\right)dx$
$\lim_{x\to-3}\left(x^2-3\right)$
$\int_0^{10}\left(6e^{-\frac{1}{5}t}\right)dt$
$\frac{dy}{dx}-\frac{y}{x}=-3$
$340+-13$
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