$\infty-\frac{5}{2}$
$3^4\cdot3^{-6}\cdot9^0$
$x+7^2$
$\int\frac{1}{\sqrt{4+\left(x+2\right)^2}}dx$
$\left(2\sqrt{3}-\frac{1}{x}\right)^2$
$\int_0^{\infty}\left(\frac{-49\cdot\cos\left(x\right)}{20\cdot x}\right)dx$
$0=2x^2-16x-18$
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