a) (100-1) * 97 = 9700-97 = 9603
b) (100 + 2) * 35 = 3500 + 70 = 3570
c) 64 * (100 - 3) = 6400 - 192 = 6208
d) 53*(100 + 3) = 5300 + 159 = 5459
