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: 2713 sottrazione 4501 aggiunta 9942 aggiunta 9443 sottrazione 8763 aggiunta 5648 aggiunta 6501
A: 
20983