-4 5/6 + 33 = -4 5/6 - 198/6 = -4 5/6 - 33 = -37 5/6.

11 - (-37 5/6) = 11 + 37 5/6 = 11 + 6 1/2 = 17 1/2.

Therefore, 11 - (4 5/6 + 33) = 17 1/2.