$\int_0^{\infty}\left(\frac{x}{2+x^2}\right)dx$
$9x^2-36xy-36y^2$
$40:2^3+5^3$
$\int_{-1}^4\:4x^{-2}\:dx$
$49\left(3z^9+n^4\right)\left(3c^9-n^4\right)$
$512\cdot16\cdot64$
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