Here's where I started:

(9^5 / 8^-6) ^-7

Multiplying each exponent by -7:

(9^5)^-7 = 9^-35

(8^-6)^-7 = 8^42

Gives me this:

9^-35 / 8^42

Should I flip it to this to get rid of the negative exponent ?:

8^42 / 9^35

...or should I leave it as the second example? I feel like I'm missing one last step.

(I haven't figured out the LaTex formatting yet... )