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: 6472 # 6421 @ 7649 @ 4005

A: 11705
****
Q: 5956 # 1397 @ 8694 # 3593 # 1578

A: 8082
****
Q: 7222 # 8647 @ 1527 @ 4398 @ 4446 @ 6564 # 9989 # 8491

A:
-2970
****