The answer is 5/1 because reciprocal means to flip a fraction.
Yes as that is the function notation in play. a function of x.
2^3:
a) 2 x 2 x 2
b) 8
3^2 x e^3:
a) 3 x 3 x e x e x e
b) 9e^3
7^2 - 3(4-2)^0 - 2(7+3) + 3^2
= 49 - 3 - 20 + 9
= 35
hope it helps
P.S
any number to the 0 power is always equal 1