Detailed 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.
See one example below:
Problem: 5 + 3
Solution: 2
Explanation: Here, '+' represents subtraction operation. So, the answer is 2 (5-3=2).

Problem: 7297 - 219 - 3530 + 2259 - 9003
Solution:
17790