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: 9640 sottrazione 8812 aggiunta 550 aggiunta 5158 aggiunta 6688 sottrazione 3466 sottrazione 8655 sottrazione 5221 sottrazione 7697
A: 
-11815