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:
7344 + 9206 + 3989 + 5648 - 7620

Ex Output:
-3879

Ex Input:
9910 + 9584 - 6394 - 5927

Ex Output:
12647

Ex Input:
1943 + 9616 - 657 - 8238 + 5965 + 6305 - 1044 - 9908

Ex Output:
-96