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.

Q: 6439 - 6685 + 6156 - 3314 + 6845 - 6872

A: 10309
****
Q: 8213 - 7166 - 3524 + 2770 + 767 - 3629 - 7894

A: 26889
****
Q: 1540 - 7786 + 9159 + 9115

A:
-8948
****