Вычислите ...Спасибо огромное!!!))

1/3 - 1/5 - 1/15 = 5/15 - 3/15 - 1/15 = 1/15 3 1/3 + 2 1/6 = 3 2/6 + 2 1/6 = 5 3/6 = 5 1/2 1 1/8 - 3/4 = 1 1/8 - 6/8 = 9/8 - 6/8 = 3/8 1/2 - 2/5 - 1/10 = 5/10 - 4/10 - 1/10 = 0 3/5 + 4 1/2 = 6/10 + 4 5/10 = 4 11/10 = 5 1/10 1 3/5 - 2/3 = 1 9/15 - 10/15 = 24/15 - 10/15 = 14/15 7/8 - 1/4 - 1/2 = 7/8 - 2/8 - 4/8 = 1/8 1 3/7 + 2 1/2 = 1 6/14 + 2 7/14 = 3 13/14 2 1/6 - 1 3/4 = 2 2/12 - 1 9/12 = 1 14/12 - 1 9/12 = 5/12