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: 1678 - 831 + 1988 - 3248 - 7672 + 8515 + 5236 - 2764 - 6078

SOLUTION: 6532

PROBLEM: 1589 + 4479 - 6111 - 3158 - 7662

SOLUTION: 14041

PROBLEM: 3426 + 9991 + 3697 + 6656 + 2480

SOLUTION:
-19398