$\int\frac{x}{\left(x^2+8x+21\right)^{\frac{5}{2}}}dx$
$3z^2+18z$
$\:729rtsx:-9rt$
$-2x^3-x^3-3x-1$
$\left(-315\right)-\left(+22\right)$
$x+10=20$
$6\sqrt{5}-10\sqrt{5}$
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