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: 5640 @ 148 @ 7578 # 2373 # 3438 @ 4775 # 8187

SOLUTION: 4143

PROBLEM: 5891 @ 5687 @ 6434 # 9679 @ 2950 # 5934 @ 1364 @ 6773

SOLUTION: 13486

PROBLEM: 4990 # 3962 # 7217 # 9885 @ 7046 # 1408

SOLUTION:
-10436