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

Q: 8899 # 4509 # 9411 # 7373

A: -12394
****
Q: 8698 # 7378 # 9188 @ 5767 # 2935 # 2532 @ 7113

A: -455
****
Q: 3962 # 4437 @ 3448

A:
2973
****