(a+b/a-b)²×2a-2b/3a+3b-(a²/a²-b²)÷a/b计算要
计算:a/b(a-b)-b/a(a-b);(1/a+1/b)÷a²+2ab+b²/a+b.
计算 (a²-2ab+b²-a+b)÷(a-b) (a+b)²÷(a-b)
计算代数式a-b+(a-2b)(a-b)+(a-2b)(a-b)²+(a-2b)(a-b)^3 当a=-3
计算:3b²/4a³÷(b³/a²)×2b/a
2b²+(a+b)(a-b)-(a-b)²,其中a=-3
计算:[(a+b)(a-b)-(a+b)²]÷(a+b).过程
[(a+2b)(a-2b)-(2a-b)²+(3a-b)(3a-5b)]÷2a
计算a^-2b³÷(a²b)^-3
(a-b)(a+b)²-(a+b)(a-b)²+2b(a²+b²)
化简 (a+b)²+2a(a-1/2b)-3(a-b)(a+b)
计算3a²b²÷a²+b×(a²b-3ab-5a²b)
(a+b/a-b)²×2a-2b/3a+3b÷ab/a²-b²