$65\cdot8$
$7^4\sqrt{38}$
$\int\:x^2\left(x^3\:+\:10\right)^{10}\:dx$
$-7x\left(-9x^2+4\right)$
$\left(-2\right)\cdot\left(-3\right)^2+\left(-2\right)^2\cdot\left(-2\right)^{-1}$
$\int\:\frac{x^2+x+1}{\left(2x+1\right)\left(x^2+1\right)}\:dx$
$-3ax^{-2}\:-\:ax^{-2}$
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