$2x\cdot e^{-1}$
$10x^2sen\left(3x+2\right)=7xsen\left(3x+2\right)$
$\frac{d}{dx}\left(3xy=8\right)$
$-3sin\left(n\pi\right)+3sin\left(-n\pi\right)$
$\lim_{x\to1}\left(\frac{2x^3-3x^2+1}{x^2-2x+1}\right)$
$3\sec^2+2\sqrt{3}-1=0$
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