question 6 answer is D
a^4 divided by a^ 7 you will subtract 7-4 to remain with three at the denominator
b^3 divided by b you will subtract 3-1 to have 2 remaining on the numerator
question 7 the answer is 7 ^ 3
7^ -4 divided by 7^-7 you will subtract -4--7 = -4 + 7 = 3
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