lcd(7, 97) = 679.
LCD of 7 and 37 is 259.
LCD(63, 7) = 63.
LCD(7, 4) = 28
LCD(7, 77) = 77
LCD(7, 9, 2) = 126.
The LCD of 7 and 20 is 140
LCD(7,9,13) = 7*9*13 which is 819
The LCD of 6 and 7 is 42
LCD(15, 7, 8) = 840.
LCD(7, 5, 10) = 10
The LCD of x, 5, 7, 15 is 105x.
The LCD of 6, 5, and 7 is 210.