$\int\frac{2}{x\sqrt{x^2+2}}dx$
$xy+\frac{y}{x}-\frac{1}{y^2}$
$\:4x\:+\:3x\:=\:77$
$\frac{dy}{dx}=\frac{\left(1-x\right)\left(1+x\right)\left(1+y^2\right)}{x^2}$
$x^2+x+8$
$\left(5a\left(x+7\right)+4ay\right)$
$\frac{x^2-8x+15}{x-5}$
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