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.

8171 + 8357 + 171 - 3129 - 6929
9701

9909 - 1362 + 9804 + 5190 + 8223 - 3758
-8188

2943 + 6178 + 4560 - 4331 + 3900 + 199 - 2537 - 5935

909