(387+543)-456*23 77:11+678:2 381-210+540:5
(387 + 543) - 456 • 23 = 930 - 10488 = - 9558 77 : 11 + 678 : 2 = 7/11 + 339 = 3736/11 = 339,636 381 - 210 + 540 : 5 = 381 - 210 + 108 = 279