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

1566 @ 1639 # 814 # 5278 @ 1717 # 4304 # 6735 @ 1407
-10802

9318 @ 858 @ 9508 @ 5403 # 5141 @ 6503 @ 9412
35861

6431 # 6243 # 676 @ 7968

7480