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: 7640 @ 3347 @ 904

A: 11891
****
Q: 8360 # 8090 @ 5957 # 5457 @ 5413 # 3343 @ 2018 @ 2458 # 6475

A:
841
****