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:
7025 + 6005 + 6548 - 4628

Ex Output:
-900


Ex Input:
2367 + 2751 + 138 + 6347 + 5297

Ex Output:
-12166


Ex Input:
8252 + 3376 - 4130 - 8245 + 1951 - 586 + 9532

Ex Output:

6354