TASK DEFINITION: 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.
PROBLEM: 1420 - 1910 - 3500 + 9535 + 3807 - 5009 - 1271 - 3426

SOLUTION: 3194

PROBLEM: 8802 - 6452 - 1721 - 4775 + 1838 + 4933 + 9964 - 6909

SOLUTION: 11924

PROBLEM: 3388 + 5233 + 5001 + 2699 - 8381 - 5514 + 7875

SOLUTION:
-3525