follow a few exponent rules and you can figure this out
when expoenents are to the power of something you can mutilply the expoents.. and when there is a minus sign in the exponent.. it's like the reciprocal is 1/ soooo...
mutilply the -2/3 by each of the exponents in the question the 8 is tricky b/c it has an invisible 1 on it :o