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

7894 @ 7649 # 4792
10751

519 @ 9686 @ 3145 # 9320
4030

7720 # 8526 # 7706 # 1506 # 3065 # 7988

-21071