In this task you will be given an arithmetic operation in Italian and you have to find its answer. The operations 'addition' and 'subtraction' have been replaced with their italian translations i.e you need to perform addition when you see 'aggiunta' and subtraction in case of 'sottrazione'.
Q: 9739 sottrazione 3872 sottrazione 5767 sottrazione 3709 sottrazione 4088 aggiunta 7883
A: 
186