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: 2856 - 7283 - 2730 - 1423 - 5897 - 8854 - 7147
Output:
36190