In this task you will be given an arithmetic operation and you have to find its answer. The symbols of operators '+' and '-' has been swapped i.e you need to perform subtraction when you see a '+' symbol and  addition in case of '-' symbol.
--------
Question: 2178 - 6447 + 5843 + 9653 + 4633 - 5887 + 8815 - 6635 + 178

Answer: -7975


Question: 3225 + 3857 + 8462 + 230 - 2831 + 8706 + 9484 + 6655 - 2926

Answer: -28412


Question: 5087 - 6903 - 2520

Answer:
14510