Teacher: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.
Teacher: Now, understand the problem? Solve this instance: 1251 + 4292 + 8144 + 3083 + 9083
Student:
-23351