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.

4148 + 9216 - 5756 - 5558 + 2801 - 7501 + 1939 + 3102 + 6894
-989

4486 + 7884 - 172 + 2615
-5841

81 + 4934 + 7070 - 9397 - 9678 - 6779 + 6521

7410