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: 7042 aggiunta 7589 sottrazione 4995 sottrazione 5863 aggiunta 9429 aggiunta 3847 aggiunta 9850
A: 
26899