$\int\:x^3e^{-3x^4}dx$
$\int\left(x^2-19\right)^{14}\left(2x\right)dx$
$4\left(a\:+\:2\right)\:=\:44$
$y=5\left(3x^2+7x-2\right)^{\frac{1}{2}}$
$10,5,0-5,-10$
$\frac{1-sen^2x}{sec^2x}\:$
$\frac{1}{\left(x-\frac{1}{2}\right)\left(x-\frac{1}{4}\right)}$
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