$\:\int_0^{\pi\:}\frac{sen\:\partial\:\:x}{\partial\:}\:d\partial\:$
$5\cdot\left(1+6\right)-4\cdot\left(6\right)+5\cdot\left(1\right)$
$2-7x\le16$
$2x^{2}+8x-6$
$\left(2-2x\right)^5$
$9x^2-18x-4y^2=27$
$-2\cdot\left(-5+\left(5-1\right)\right)\cdot\left(-3\right)+2-\left(2-5\right)\cdot\left(-2-1\right)$
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