$6+4x=2x^2$
$\:2\left(4z+2\right)+6$
$1.10^{-5}\left(1-x\right)$
$\int\left(\cos\left(4x-2\right)\right)dx$
$\int x\left(2x^2+x\frac{1}{2}-3e^x\right)dx$
$\frac{xsen\left(x\right)}{x^3}$
$2a\left(4a-5\right)-3a\left(-2a-5\right)$
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