(a+2b)[(a+2b)²-6ab]
化简 (a²+b²/a²-b²-a-b/a+b)÷2ab/(a-b)(a+b)&
a+b/2ab
2AB/A+B
a³+a²b-(4a²b+3ab²)+b³+6ab²+2b&
(9a²-6ab+b²)/(3a²-ab),其中b/a=2
计算:(a²-b²)/(a+b)+(a²-2ab+b²)/(a-b)
化简a/a-b - b-a+b + 2ab/a²-b²
3ab+3b²/b(a²+2ab+b²) ×a²-b²/a-b ÷b/
(a-b)(a^2+ab+b) 化简
(a+b/a-b)²×2a-2b/3a+3b÷ab/a²-b²
计算 (a²-2ab+b²-a+b)÷(a-b) (a+b)²÷(a-b)
化简 a²-2ab+b²/a²-b²+b/a+b