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: 6203 # 8978 # 1139 @ 240 # 4716

SOLUTION: -8390

PROBLEM: 5474 @ 2497 @ 6991 @ 302 # 1963 # 6932 # 5953 # 4859

SOLUTION: -4443

PROBLEM: 8885 # 9148 # 6665 # 7609 @ 4183 @ 3591 @ 5158 # 5649 @ 9511

SOLUTION:
2257