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: 9889 @ 8457 # 4692

A: 13654
****
Q: 7671 # 7716 @ 5899 @ 2520 # 497 # 24 # 16 # 840 # 9556

A: -2559
****
Q: 7632 @ 320 # 6951 @ 1642 # 6799 # 3204 # 2501

A:
-9861
****