$\frac{d}{dx}\frac{x^2}{x+y}=y^2+2$
$2x^2-8x-3x+52$
$4x^2-x=0$
$75.1\:+56.13$
$csc^2\left(-x\right)$
$\left(+136\right).15$
$\left(3x^3+4y^2\right)^2$
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