Please Simplify:

(root5 a^7/2)^4 a^3/a^8

I am having a hard time figuring where to start on this problem. Can someone please help me?

2 answers

(sqrt5)^4=25
(a^7/2)^4=(a^3.5)^4=a^14
a^14 *a^3*a^-8=a^9

check my thinking.
Not too sure if that is correct. This is what I got.

= (sqrt (5)4*(a (7/2)) 4) a3-8
=5(1/2)*4*a (7/2)*4*a3-8
=25 a14 a-5
=25 a9

Is this correct?