Instructions: 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.
Input: 5823 + 9414 - 4635 + 8951 - 3513 + 4644 + 7921
Output:
-16959