$x^9y^{'\:}+9y^2=0$
$2\sqrt{4}^2$
$3n^{\frac{-2}{3}}\cdot2n^{-2}$
$w^2-3w-28$
$y=x-\frac{1}{x^2}$
$\sqrt[3]{27}\cdot512$
$3x^2-10x$
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