a)6b+(5-(b-3b-2))=6b+(5-b+3b+2)=6b+5-b+3b+2=8b+7
б)5a-(7a+(3a-(1-a)))=5a-(7a+(3a-1+a)=5a-(7a+3a-1+a)=5a-7a-3a+1-a=1-6a
=8b+7
б) 5a-(7a+(3a-(1-a)))=5a-(7a+(3a-1+a))=5a-(7a+(4a-1))=5a-(7a+4a-1)=5a-(11a-1)=5a-11a+1=
=-6a+1
a)6b+(5-(b-3b-2))=6b+(5-b+3b+2)=6b+5-b+3b+2=8b+7
б)5a-(7a+(3a-(1-a)))=5a-(7a+(3a-1+a)=5a-(7a+3a-1+a)=5a-7a-3a+1-a=1-6a