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: 9930 # 7864 @ 6797 # 6092 @ 1146 @ 1388 # 8545 # 9163

A: -12403
****
Q: 1086 # 7477 # 9664 @ 5904 # 8033 # 5563

A: -23747
****
Q: 6662 @ 3262 @ 7144

A:
17068
****