$-2-\left(-1+-3\right)$
$d^3y=sen\:xdx^3$
$\cos\left(2x\right)-\cos\left(4x\right)=\sqrt{3}\sin\left(3x\right)$
$\frac{x}{\left(4+x\right)^2}$
$7-\frac{-14}{2}$
$\tan\left(a\right)\left(\cot\left(a\right)+\tan\left(a\right)\right)$
$\left(2x-\frac{1}{2}\right)\left(x-\frac{1}{2}\right)$
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