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:
8625 - 7177 + 4191

Ex Output:
11611


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

Ex Output:
-2890


Ex Input:
7769 + 9568 + 388 - 5101 - 8590 - 9063 - 5298 + 7728

Ex Output:

18137