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.

781 + 6816 + 5971
-12006

9885 + 402 + 66 + 4818 + 2654 - 4301 + 2712 + 5842 - 2959
651

7211 + 3764 + 6819 + 3499 + 8223 + 6639 - 1337 + 6580 + 8725

-35701