$\left(\frac{2x^{-2}}{4y^{-1}}\right)^{-3}$
$3x+9=7x+1$
$4\frac{1}{3}\frac{3^2}{2}$
$4n^2+20n+100$
$2800-440-167$
$\frac{x-arctan\left(x\right)}{x}$
$\left(a+2\right)\left(x+5\right)$
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