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: 6439 - 6685 + 6156 - 3314 + 6845 - 6872

SOLUTION: 10309

PROBLEM: 1989 - 7828 - 4806 - 7481 + 9860 - 9696 - 7086 + 272 + 8952

SOLUTION: 19802

PROBLEM: 9503 + 4148 + 6058 - 8267 + 7071 + 7760 - 5373

SOLUTION:
-1894