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: 2863 @ 9899 # 2358

A: 10404
****
Q: 8695 # 5705 @ 957 # 7767 @ 7907 @ 2779 # 8531 @ 4709

A:
3044
****