You can put this solution on YOUR website!
Let's write this (k^9)^5(k^3)^2 in another way and maybe it will make more sense.
(k^9)(k^9)(k^9)(k^9)(k^9)(k^3)(k^3) From this we can see that there are:
(k^45)(k^6) Following so far? From here we can do:
k^51 and there's the answer.
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