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: 6472 # 6421 @ 7649 @ 4005

SOLUTION: 11705

PROBLEM: 1380 @ 6582 # 4036

SOLUTION: 3926

PROBLEM: 3036 # 4765 @ 5985 @ 2440

SOLUTION:
6696