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: 8025 - 6991 - 3299 + 9670 - 3471

SOLUTION: 12116

PROBLEM: 2759 - 7972 - 7615 + 151

SOLUTION: 18195

PROBLEM: 8578 + 1666 + 2998 + 5026 + 2187 - 9438 + 7146 + 2044 - 2407

SOLUTION:
-644