Hi is there any way I can simplify this large expression?

$\displaystyle \displaystyle{\frac{1}{3}\displaystyle{(}\frac{450 0-x^2}{2}\displaystyle{)}^{-\frac{2}{3}}}$

I get three fraction bars if I change the exponent so I tried to multiply the 3 inside the denominator. I'm just wondering if there's a better or any further way I can do and take this?