(1 + 2 * 3) * 4 + 5 + 6 + 7 - 8 + 9 = 47 1 + 2 * 3 = 7 7 * 4 = 28 28 + 5 = 33 33 + 6 = 39 39 + 7 = 46 46 - 8 = 38 38 + 9 = 47