for b), the answer is 3^2 / 2^7
you just have to multiply the exponent of 2 with 2 and add it with 3
for c), the answer is -(3)^3
notice that the negative sign is outside the parenthesis
for d), the answer is 1
you just multiply -n with 3 and all the exponents since they all have the same base
for e), the answer is 2a^2 b
just distribute the exponent 2 to all the bases and cancel out the things that can be cancelled or just subtract exponents of the same bases if the operation is division
for f), the answer is b^4 / 2b^4
focus first on the things inside the parenthesis, then take not of the -1 exponent after
