$sen\left(2x\right)\left(\csc\left(2x-2\right)\right)$
$\int_0^{\pi}sen^3x\:cos\:x\:dx$
$28a-24ab$
$\int\frac{1}{\sqrt{x+4}}dx$
$\frac{2x^2+x+1}{x+2}$
$\left(-87.765\right)\cdot\left(-85\right)$
$\left(7x^2-2y\right)\left(49x^4+14x^2y+4y^2\right)$
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