10^2 - 7^2 = 100 - 49 = 51
5^3 - 5^2 = 125 - 25 = 100
42^2 : 14 - 4^2 * 6 = 1764 : 14 - 16 * 6 = 126 - 96 = 30
8^3 : 4^2 - 2^3 = 512 :16 - 8 = 32 - 8 = 24
25^2 : (24^2 + 7^2) = 625 : (576 + 49) = 625 : 625 = 1
10^3 - 10^2 + 9^3 = 1000 - 100 + 729 = 900 + 729 = 1629