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: 4853 aggiunta 2450 sottrazione 3500 sottrazione 3903 aggiunta 8383 aggiunta 1346
A: 
9629