$sen^2\left(a\right)-cos^2\left(b\right)=1$
$4dy+ydx=x^2dy$
$5i+2\frac{dy}{dt}i=10$
$\:y\:=\:4x\:-\:5,\:si\:x=4$
$\frac{dy}{dx}=e^{-y}cosx$
$4\left(\tan^2\left(x\right)\right)-1$
$\left(4x^3-3a^2\right)\left(3a^2+4x^3\right)$
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