14х4+16х4 = 30х4 = 12018х3+12х3 = 30х3 = 9013х7+7х17 = 20х7 = 14068х18-68х8 = 68(18-8) = 68х10 = 68074х16-74х15 = 74(16-15) = 74х1 = 7433х52-31х52 = 2х52 = 104
14х4+16х4 = 30х4 = 120
18х3+12х3 = 30х3 = 90
13х7+7х17 = 20х7 = 140
68х18-68х8 = 68(18-8) = 68х10 = 680
74х16-74х15 = 74(16-15) = 74х1 = 74
33х52-31х52 = 2х52 = 104