$\int\:\frac{x}{\:\sqrt{x+1}}dx$
$19+\left(-199\right)-1999-19999$
$\int x^2e^{-8x^3\:}dx$
$\left(2n^2xnx4\right)^2$
$-2y^2\left(x-y\right)$
$\left(1+3x^2-y^2\right)^2$
$z+z\left(z+6\right)$
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