$\frac{x^{-4}-y^{-4}}{x^{-2}-y^{-2}}$
$2m^3+5m+m^3-4m-2$
$x^{2x+2}$
$\frac{dy}{dx}=\frac{1}{2400}\left(-x^2+600x\right)$
$\left(\frac{2z^6}{6z^3}\right)^2$
$\left(4a^3b^2-2a\right)^2$
$1,200+2,00$
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