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: 4238 # 9059 # 3579 @ 2750 # 6861 # 5756 @ 9729

SOLUTION: -8538

PROBLEM: 7437 # 5451 # 5085 @ 614 # 8829 @ 3925 # 1602 @ 3657 @ 8267

SOLUTION:
2933