(a+b/a-b)² * 2a-2b/3a+3b - a²/a²-b² ÷ a/
2(a²+b²)(a+b)²-(a²-b²)²
5a²-3a²+3(a²-b²)-2(5a²+2b²)怎么合
先化解:(a² -b² /a² -ab ) /a² +2ab+b² /
先化简再求值(a-b/a+b)+(a+b/a-b)-(2a²-2b²/a²+b²
2(a²b+3ab²)-3(a²b-1)-2a²b-2
计算下列各题(a+b/a-b)²*2a-2b/a+3b - a²/a²-b²÷a
a-b+2b²/a+b
已知a+b=-2,ab =-3,求a(a²-b²)-a(a²+b²)²
化简代数式:[(a²+b²)/(a²-b²)÷2ab/(a-b)(a+b)&su
(a+b)/(2a+2b)乘(a²+b²)/(a²-b²) 计算
化简:(b²-a²)/(a²-2ab+b²)
化简(a²-2ab+2b²)-(2a²-2ab-3ab²)