$\int\:\frac{sen\left(\frac{1}{x}\right)cos\left(\frac{1}{x}\right)}{x^2}dx$
$\int\left(x-3\right)\cdot\left(x+1\right)$
$47-\left(-5\right)$
$14x^2-21$
$\left(x^2y^3\right)^{\frac{2}{3}}$
$8x+4y+5x-3y$
$8-5z=-10-2z$
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