$\frac{d}{dx}\:y=sen\left(x\right)\cos\left(3x\right)$
$\left(+29\right)\left(-24\right)$
$\lim_{x\to0}\left(\frac{\left(x\right)}{\left(\sqrt{1-cos\left(2x\right)}\right)}\right)$
$\:\:n\:2\:+\:n\:-\:20\:=\:$
$\int-20x^{-5}dx$
$\frac{\csc^2x-1}{\cot x\cdot\cos x}=\frac{1}{\text{sena}}$
$\left|12\cdot\left(-6\right)\right|$
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