((1 2/5):1 2/5-5/6)*4 2/7+(28-27 6/7)*53

Question

((1 2/5):1 2/5-5/6)*4 2/7+(28-27 6/7)*53

Answer 1

(1 2/5 : 1 2/5 - 5/6) * 4 2/7 + (28 - 27 6/7) * 53 = (1 - 5/6) * 30/7 + 1/7 * 53 = 1/6 * 30/7 + 1/371 = 5/7 - 1/371 = (265-371)/371 = -106/371 = -2/7