instruction:
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.
question:
4515 - 2156 - 8427 - 2175
answer:
17273


question:
9051 - 8971 + 6555 - 1135 - 4091 + 9374 + 9487 + 1868
answer:
-4036


question:
6108 + 6734 + 3016 + 637 - 2671 - 5486 - 1133 + 1713 - 2180
answer:

5478