Буду : 3 раскрыть скобки и подобные члены: 1) 4m-(3n+(7m-(8n-( 2) a-(2b-(3a-(4b-(1-

1)4m-(3n+(7m-(8n-(3+2m=4m-3n+7m-8n-3-2m=4m+7m-2m-3n-8n-3=11m-2m-11n-3=9m-11n-3
2)a-(2b-(3a-(4b-(1-2a=a-2b-3a-4b-1+2a=a-3a+2a-2b-4b-1=-2a+2a-2b-4b-1=6b-1