90-48:3. (90-48):3. (56+28):14. 56+28:14.
90-48:3 = 90 - 16 = 74 (90-48):3 = 42 / 3 = 14 (56+28):14 = 84 / 14 = 6 56+28:14 = 56 + 2 = 58
90-48:3=74 (90-48):3=14 (56+28):14=6 56+28:14=54