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 Input:
9634 + 5896 + 2965 + 6949 - 2226 + 9649 - 3599 - 7110

Ex Output:
-2890


Ex Input:
8213 - 7166 - 3524 + 2770 + 767 - 3629 - 7894

Ex Output:
26889


Ex Input:
4900 - 7450 - 73

Ex Output:

12423