Помоги пожалуйста упростить
A 1)4a/[(a-1)(a+1)]+(a-1)/(a+1)=(4a+a²-2a+1)/[(a-1)(a+1)]= =(a²+2a+1)/[(a-1)(a+1)]=(a+1)²/[(a+1)(a-1)]=(a+1)/(a-1) 2)(a+1)/(a-1)*a/(a+1)=a/(a-1) 3)a/(a-1)-a(a-1)=0 b 1)a+6 + 6/(a-6)=(a²-36+6)/(a-6)=(a²-30)/(a-6) 2)(a²-30)/(a-6)*(a-6)²/(a²-30)=a-6