6 / ((5 / 4) - 1) 8 / (3 - (8/3)) (6 * 4) / (1 + 3) (8 * 6) / (1 + (6 / 6)) (5 - (2 / 10)) * 5 (2 x 12) / (5 - 3) 12 / ((12 / 8) - 1) ((5 * 13) + 7) / 3