А) 8640*506:720-(87092+176068):645 = 5664
1) 87092+176068 = 263160
2) 8640*506 = 4371840
3) 4371840:720 = 6072
4) 263160: 645 = 408
5) 6072 - 408 = 5664
Б) 7230*306:540-(84256+278152):712 = 3588
1) 84256+278152 = 362408
2) 7230*306 = 2212380
3) 2212380:540 = 4097
4) 362408:712 = 509
5) 4097 - 509 = 3588