$2\cos x-1=-4\cos x+2$
$\int_2^{senx}\left(\sqrt[3]{4t+5}\right)dx$
$\lim_{x\to0}\left(\frac{1}{2x^2}\right)$
$x+2y=3$
$\left(x+y\right)\left(x+z\right)$
$3x+6x-12$
$\frac{d}{dx}\frac{x^8cosx}{tanx}$
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