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.

2759 - 7972 - 7615 + 151
18195

8294 + 6661 + 4555 + 6171
-9093

8862 - 4987 + 8376 - 5287 - 6341 + 1165 + 5067 + 7802 - 6344

9411