Four of the five parts numbered (1), (2), (3), (4) and (5) are exactly equal. The number of that part which is not equal will be your answer.
683 – 48 × 13 – 58 = 1 57 × 9 – 512 = 1 47 × 18 – 845 = 1 99 × 9 – 365 × 2 – 32 × 5 = 1 489 + 682 – 57 × 3 – 35 × 16 – 440 = 0