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.
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Question: 6639 - 5724 - 3521 - 6709 - 6185 + 6067 + 9560 - 9829 + 8371

Answer: 14609


Question: 6817 + 2415 - 9368 - 2334

Answer: 16104


Question: 4071 - 2406 + 1349 + 5528 + 7426 + 2448 - 1981 - 7844

Answer:
-449