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: 7337 + 5801 - 8640 - 4143 - 2557

SOLUTION: 16876

PROBLEM: 5539 + 616 - 1640 - 7665 - 8787 - 5104 + 8431 + 9502

SOLUTION: 10186

PROBLEM: 7666 + 2001 - 3595 - 6853 - 3287 - 3918 + 3085 - 9808 - 67

SOLUTION:
30108