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: 6020 + 1977 + 708 + 1899 + 3704

SOLUTION: -2268

PROBLEM: 8997 - 892 + 5939 - 3610 - 9380

SOLUTION:
16940