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:
5335 + 8307 + 4845 + 6853 - 9847 + 7289

Ex Output:
-12112


Ex Input:
6567 + 2835 + 6725

Ex Output:
-2993


Ex Input:
6492 - 3901 + 3666 + 9196 - 3917 - 133

Ex Output:

1581