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: 2447 sottrazione 3747 aggiunta 3868 sottrazione 9476 aggiunta 3894
A: 
-3014