$\lim_{x\to o}\frac{sen2x}{x}$
$\frac{dy}{dx}=6x^5\sec\left(y\right)$
$\frac{cos^2x}{1\:+sin\:x}$
$\int\left(5x^2-8x\right)^5\left(5x-4\right)dx$
$4x^2+16x+19$
$2x^2-x\:-\:36\:=0$
$m^2+19m+48$
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