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: 4787 # 6151 # 6235

A: -7599
****
Q: 3147 @ 2272 # 9050

A: -3631
****
Q: 6519 @ 3975 # 1429 # 3453 @ 3955 # 9240

A:
327
****