5 - 4 + 6 - 3 = 4 (5 - 4).6 . 3 = 18 5 + 4 + 6 + 3 = 18 5 + 4 . 6 - 3 = 26 5 - 4 + 6 . 3 = 19 5 . 4 - 6 + 3 = 17 5 . 4 + 6 - 3 = 23 (5 + 4).(6 - 3)=27 5 + 4 + (6 . 3)=27 5 + 4 .(6 - 3)=27 5 4 6 3 = 15