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: 1664 # 2003 # 3533

A: -3872
****
Q: 877 # 7761 # 7154 # 4993 # 2712

A: -21743
****
Q: 298 @ 1699 @ 1367 @ 5001

A:
8365
****
