2 5/6 - 3/4 - 1 1/10 + 8/15 + 4 1/2 - (1 5/12 - 1/2)

1) 2 5/6 - 3/4 - 1 1/10 + 8/15 + 4 1/2 - (1 5/12 - 1/2) = 5 1/6 2) 1 5/12 - 1/2 = 11/12 3) 2 5/6 - 3/4 - 1 1/10 + 8/15 + 4 1/2 - 11/12 = 5 1/6