Question

-(3m+n)-[2m+{-m+(2m-2n-5)}]-(n+7)
Ayuda!!

Answer 1

-(3m+n)-[2m+{-m+(2m-2n-5)}]-(n+7)
-3m-n-[2m+{-m+2m-2n-5}]-n-7
-3m-n-[2m-m+2m-2n-5]-n-7
-3m-n-2m+m-2m+2n+5-n-7
-6m +0n -2
-6m-2