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: 9506 sottrazione 8000 sottrazione 4893 sottrazione 5830 aggiunta 5205 aggiunta 5996 sottrazione 8832 sottrazione 9921 sottrazione 4432
A: 
-21201