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: 8899 # 4509 # 9411 # 7373

SOLUTION: -12394

PROBLEM: 3765 @ 8333 @ 5726

SOLUTION: 17824

PROBLEM: 5563 # 9058 # 9315 @ 8971 # 3360 # 1291

SOLUTION:
-8490