Teacher:In this task you will be given an arithmetic operation and you have to find its answer. The operators '+' and '-' have been replaced with new symbols. Specifically, '+' has been replaced with the symbol '@' and '-' with the symbol '#'. You need to perform the operations in the given equation return the answer
Teacher: Now, understand the problem? Solve this instance: 9921 @ 5791 @ 7863 # 3364 # 2155 @ 5553 # 1682
Student:
21927