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: 8842 @ 3530 @ 7537

A: 19909
****
Q: 486 # 3873 # 1187

A: -4574
****
Q: 7384 # 5307 # 6456 # 9693 # 9235

A:
-23307
****