I did this one using the Power Rule

$\displaystyle

f(x)=\frac{(x^10-x^2)}{x^3}

$

And I Get

$\displaystyle

\frac{10x^9-2x}{3x^2}

$

$\displaystyle

\frac{10x^8-2}{3x}

$

$\displaystyle

\frac{2(5x^8-1)}{3x}

$

I'm supposed to find the derivative. Is that it to this?