$\left(x+y-3w\right)\left(x+y+3w\right)$
$\frac{dr}{dg}=\frac{sen\:g\:+\:e^{2r}\:seng}{3e^r+e^rcosg}$
$\left(8x+27\right)^3$
$\frac{d}{dx}\left(\ln\left(7\right)\right)$
$\frac{-1}{infinito}$
$x^2=8x+15$
$\cot x\left(\sin\left(x\right)+\sec\left(x\right)\right)$
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