Simplify the expression where possible.
(r^-3 s^2 t)^4
I cannot figure this one out. Thanks
I guess remove the outside power, giving
r^-12 s^8 t^4
Not sure that's any simpler. Or maybe they want only positive powers?
s^8 t^4/r^12
I suggest you look at similar examples in your text, to see what they did there.