化简a²-2(ab-b²)-b²
化简 (a²+b²/a²-b²-a-b/a+b)÷2ab/(a-b)(a+b)&
化简a/a-b - b-a+b + 2ab/a²-b²
化简 a²-2ab+b²/a²-b²+b/a+b
化简:a²-2ab+b²/a²-b²+b/a+b
a²-2ab+b²化简
3ab+3b²/b(a²+2ab+b²) ×a²-b²/a-b ÷b/
化简a²-2(ab-b²)-b²
化简 a²-(2ab-b²)-b²
化简 b²-a²/a²-ab÷(a+(2ab+b²/a))·(1/a+1/b)
计算:(a²-b²)/(a+b)+(a²-2ab+b²)/(a-b)
【4ab/(a-b)+(a/b-b/a)÷(1/a+1/b)】÷(a²+2ab+b²)化简
1、化简:2(a²b+ab²)-(2ab²-1+a²b)-2;