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: 8157 - 2717 - 1214 + 8558 + 7391 - 7163 + 6203 - 6912

Answer: 4011


Question: 9885 + 402 + 66 + 4818 + 2654 - 4301 + 2712 + 5842 - 2959

Answer: 651


Question: 7455 - 1018 - 9836 + 3112 + 3640 - 6423

Answer:
17980