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: 7640 @ 3347 @ 904

A: 11891
****
Q: 1199 # 1369 @ 4358 # 7803 @ 410 @ 1295 @ 4397 # 9436 @ 5291

A: -1658
****
Q: 6454 @ 885 @ 4489 @ 543 @ 9829 @ 5761 # 2617

A:
25344
****