$( - 2 x - y ) ^ { 2 }$
$e^y=x+1$
$490x^2-340x-510$
$\left(3x^2+7y\right)^2$
$36x^2y^4-48x^3y^3-60x^4y^4$
$\frac{x^2+2x+5}{x+3}$
$\int\:\frac{5x+3}{\sqrt{x}}dx$
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