1. Derivative Simplifying

I took the derivative of

x^(2/3) * (x-5)

and so far I have

my answer is circled, but the "correct answer" is the one under it. How do I get it to that? Can't figure out the simplification

2. $\displaystyle \frac{5x^{\frac{2}{3}}}{3} - \frac{10}{3x^{\frac{1}{3}}}
$

common denominator is $3x^{\frac{1}{3}}$ ...

$\displaystyle \frac{5x^{\frac{2}{3}} \cdot x^{\frac{1}{3}}}{3x^{\frac{1}{3}}} - \frac{10}{3x^{\frac{1}{3}}}$

$\displaystyle \frac{5x-10}{3x^{\frac{1}{3}}}$