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: 6942 @ 1857 @ 1508 @ 3059 # 6727

SOLUTION: 6639

PROBLEM: 3407 @ 917 # 567 @ 5987 # 5936

SOLUTION: 3808

PROBLEM: 8623 # 8020 @ 5742 # 3555 @ 6642

SOLUTION:
9432