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.

3394 - 2316 - 9713
15423

7671 - 2300 - 9650 - 6692 + 7656 + 4940 - 2878 - 5602 + 7222
14975

358 - 3400 + 1145 - 1239 + 2838 + 1489

-475