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: 4098 sottrazione 8778 aggiunta 206 aggiunta 1742 aggiunta 1109 aggiunta 9157
A: 
7534