$\int\left(\sqrt{x}+\frac{1}{\sqrt{x}}\right)^2dx$
$3x-2y=15$
$15=-16+v$
$20+\left(-3.05\right)+\left(-9.5\right)$
$z=\left(7i+\frac{9}{i}\right)^{-1}$
$\left(\frac{2}{3}a+5b\right)$
$-2x\ge x-8$
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