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: 1566 @ 1639 # 814 # 5278 @ 1717 # 4304 # 6735 @ 1407

A: -10802
****
Q: 4449 @ 4019 @ 7637

A: 16105
****
Q: 7745 @ 5832 # 4271 # 4750 @ 8466 # 2676 @ 6861

A:
17207
****