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: 8137 + 5006 - 7743 + 1478

SOLUTION: 9396

PROBLEM: 7961 - 5474 + 4234 - 4358 - 7627 - 2291 - 9771 + 9867 - 813

SOLUTION: 24194

PROBLEM: 9000 - 4427 - 4292 + 8958

SOLUTION:
8761