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: 8070 aggiunta 1780 sottrazione 4827 aggiunta 8285 aggiunta 5775 sottrazione 4177 sottrazione 2455
Student:
12451