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: 1510 + 8779 + 5742 - 9951 - 2155

Answer: -905


Question: 240 - 438 + 497 - 5901 - 1960 + 4782 + 6400 - 4055

Answer: 915


Question: 7412 + 2887 - 4805 + 3349 - 2387 + 7968 - 1148

Answer:
1548