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:
8988 + 9565 + 4047 - 1723 + 7160 - 8838 + 5611 + 7126

Ex Output:
-13960

Ex Input:
6051 + 6310 + 7813 + 2282 - 7601 + 4598 - 1928 - 9696 - 6497

Ex Output:
10770

Ex Input:
4665 + 538 - 3320 + 2517 + 5236

Ex Output:
-306