a) = 2^4 - 2^3 = 2^3 ( 2-1) = 2^3 x 1 = 8
b) = (7 x 11)^10 - 77^(9+1) = 77^10 - 77^10 = 0
c) = 21 ^34 - 7^34 - 3^34 = ( 21-7-3)^34 = 11^34
d) = 1 + 4 + 27 + 256 = 288
e) = 1 + 1 + 1 +1 = 4 ( orice numar la puterea 0 este = 1)
f) = 256 - 27 - 4 - 1 = 224