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:
4286 + 2085 - 8347

Ex Output:
10548


Ex Input:
1260 + 6532 + 3162 + 7255

Ex Output:
-15689


Ex Input:
1696 - 4705 + 6

Ex Output:

6395