5/6 + (2 - 1 23/35) * 9/25 - 1 1/4

5/6 + (2 - 58/35) * 9/25 - 5/4 = 5/6 + (70/35 - 58/35) * 9/25 - 5/4 = 5/6 + (12/35) * 9/25 - 5/4 = 5/6 + 108/875 - 5/4 = 5/6 - 5/4 + 108/875 = 10/12 - 15/12 + 108/875 = -5/12 + 108/875 = -4375/10500 + 1296/10500 = -3079/10500