$2\cos^2\left(x\right)-1\:=sen\left(x\right)$
$\left(4y^2\right)\left(6y^2-3y+5\right)$
$\left(m+31^{2}$
$2x^2y^2+x^2+y^2-5,\:x=2,\:y=1$
$\frac{dy}{dx}=\frac{2sinx}{cosxsiny}$
$\sqrt[a+1]{x^{-1}}\sqrt[a]{x}\sqrt[a+1]{x}$
$x^2=12y$
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