Teacher: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'.
Teacher: Now, understand the problem? Solve this instance: 2371 aggiunta 3869 aggiunta 3552 sottrazione 191 sottrazione 3422 sottrazione 199 aggiunta 7160
Student:
13140