TASK DEFINITION: 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
PROBLEM: 8137 @ 5006 # 7743 @ 1478

SOLUTION: 6878

PROBLEM: 497 # 7667 # 405 # 5403 @ 8444 @ 5031 # 1411 # 2392

SOLUTION: -3306

PROBLEM: 3454 @ 5523 @ 9175 # 1201 # 9611 # 2667 # 8318 @ 8031 @ 8371

SOLUTION:
12757