$\frac{\left(1+x\right)^2}{x+2}$
$\int7x^4dx$
$-5v^3w^2-12.3v^3w^2$
$\left\{42\left(\frac{1}{7}z^7+\frac{1}{6}\right)\right\}^2$
$x^2-5x+212$
$x^2+3x+7$
$\frac{dy}{dx}+\frac{y}{x}=\frac{3}{x}$
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