1) 98 - 87 = 112) (20018 - 1986) / 98 + 16 = 150 + 16 = 1663) (20018 - 1986) / 49 + 16 = 386 + 16 = 402
1) 98 - 87 = 11
2) (20018 - 1986) / 98 + 16 = 150 + 16 = 166
3) (20018 - 1986) / 49 + 16 = 386 + 16 = 402