$x^2+20x+x$
$x^2+18x-9=0$
$\frac{x^{3m}\cdot x}{x^{3m}\cdot x^{-2}}$
$\frac{y}{y^4}$
$\int\frac{2000}{\sqrt{300q}}dx$
$\int-\frac{2}{\left(x-1\right)\left(x+1\right)+1}dx$
$\frac{54}{9}$
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