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.

1510 + 8779 + 5742 - 9951 - 2155
-905

5335 + 8307 + 4845 + 6853 - 9847 + 7289
-12112

2119 + 2520 + 8753 + 4692 + 2059 - 2935 - 8863 + 1741 - 577

-5271