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: 1162 aggiunta 5989 sottrazione 6204 sottrazione 7971 aggiunta 813 sottrazione 767
A: 
-6978