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:
7555 + 8285 + 7132 + 9363 - 3515

Ex Output:
-13710


Ex Input:
7163 + 3916 + 4926 + 2532 - 2743 - 5389 + 7290

Ex Output:
-3369


Ex Input:
7461 + 8359 - 3442 + 3999 - 3564 + 6985

Ex Output:

-4876