To evaluate an exponential expression, write each factor as many times as indicated by the exponential. Then multiply:
3^{4} = 3·3·3·3 = 81
2^{3}·3^{2} = (2·2·2)·(3·3) = 8·9 = 72

Evaluate (3)^{2} and 3^{2}
(3)^{2} = (3)·(3) = 9
3^{2} = (3·3) = 9