5/6 + 2 3/4 : 4 8/9 * 2 2/3 - 1 2/3 + (3/17 - 1 16/17 : 11) = 5/6 + 11/8 : 44/9 * 8/3 - 5/3 + (3/17 - 33/17 : 11) = 5/6 + 11/8 * 9/44 * 8/3 - 5/3 + (3/17 - 33/17 * 1/11) = 5/6 + 9/32 * 8/3 - 5/3 + (3/17 - 3/17) = 5/6 + 3/4 - 5/3 = (10+9-20)/12 = -1/12