计算:(-a²b)*(2ab)³+10a^5b^4
计算:(a+b)²-4ab
计算 (8a³b–5a²b²)÷4ab
计算:(4ab³+6a³b-8a³b²)÷2ab-(a+b)(3a-2b)
计算 (a²-2ab+b²-a+b)÷(a-b) (a+b)²÷(a-b)
计算:(a^n b^4)³·a^5 b^2n-9 -(a^n+1 b)³·(ab^n)²
计算:a/b(a-b)-b/a(a-b);(1/a+1/b)÷a²+2ab+b²/a+b.
计算{(a-4ab除以(a+b)+b}除以{(a除以(a+b)-(b除以b-a)-(2ab除以a的平方-b的平方)}
计算(a+b-c)(a+b+c)-【(a-b)²+4ab】
计算 {-(a²/b)}²÷{-(a/b²)}³×(1/ab)^4
(-1/4a³b)(-1/2a²b-1/3ab+1)计算
计算(a-2b)(a+2b)(a²+2ab+4b²)(a²-2ab+4b²)
计算:(a²-b²)/(a+b)+(a²-2ab+b²)/(a-b)