$\left(2x\right)\left(x+4y+2y^2\right)$
$\left(sen\left(a\right)+cos\left(a\right)\right)^2=1+\frac{2sen\left(a\right)}{cos\left(a\right)}$
$\int\frac{5x^2}{\left(2x+5\right)}dx$
$\frac{16x}{4x}$
$-\sqrt[7]{128}$
$x^2-3x+25$
$x\frac{dv}{dx}=\frac{v\left(1+v^2\right)}{1-v^2}$
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