a^2+2ab+b^2-2a-2b+1块块

a+b/2ab 2AB/A+B a+b/2ab (a-b+ab-a^2/a+b)乘以[a+1/a-b乘以(1+a/b)] (a+b-2ab)(a+b-2)+(1-ab)^2 急……ab/(a+b-1)(a+b) + ab/(a+b)(a+b+1) + ab(a+b+1)(a+b+2) + …… + ab/(a+b+98)(a+b+99) + ab/(a+b+99)(a+b+100) 计算ab/(a+b-1)(a+b)+ab/(a+b)(a+b+1)+ab/(a+b+1)(a+b+2)+.+ab/(a+b+98)(a+b+99)+ab/(a+b+99)(a+b+100) (a-b)平方-2ab(b-a) (a-b)^3+2ab(a-b) ab^3+b^2+b-a+1 因式分解：a×a×a-2a×a×b+ab×b a(a+b)(a-b)-a(a+b)(a+b),其中(a+b)=1,ab=-1/2 a(a-1)-(a×a-b)=-5,求(a×a+b×b)÷2-ab a^2b(a-b)-6ab(b-a), a^2b(a-b)-7ab(b-a)因式分解 b/(a^2-ab)+c/(b^2-ab)+(a+b^2)/(a^2b-ab^2) [(a^2-2ab)/-ab+b^2]/[(a/a+b)/(2ab/2b-a)] 若a/b=2 则a*a-ab+b*b/a*a+b*b等于?