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: 3881 + 3747 + 6493 - 7538

SOLUTION: 1179

PROBLEM: 3477 + 8970 + 2278 - 9906 - 106 - 208 - 1334

SOLUTION: 3783

PROBLEM: 7891 + 2236 + 2518 - 4555 - 9475 + 8472

SOLUTION:
8695