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.

[EX Q]: 8737 - 2978 - 6717
[EX A]: 18432

[EX Q]: 5450 - 7077 + 4877
[EX A]: 7650

[EX Q]: 2616 - 6654 + 1780 - 419
[EX A]:
7909