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: 6628 @ 7709 @ 528 @ 8813

A: 23678
****
Q: 440 @ 5472 # 6900 # 3389

A: -4377
****
Q: 8630 # 9965 @ 4174 # 9729 @ 2104 @ 4108

A:
-678
****