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: 525 sottrazione 635 aggiunta 6259 sottrazione 7196 sottrazione 2343 aggiunta 1618
A: 
-1772