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:
6040 + 5815 + 9288 + 5107 + 5697 + 7993 - 672 + 8297

Ex Output:
-35485


Ex Input:
8294 + 6661 + 4555 + 6171

Ex Output:
-9093


Ex Input:
6986 - 2905 + 3910 + 7435

Ex Output:

-1454