计算:(-x^n)^2(-y^n)^3-(x^2y^3)^n
计算(x-y)^3n*(y-x)^2n÷(y-x)^5n(n为正整数,且x≠y)
计算(-3x^n y)^2乘以2x^(n-1)y的结果是
化简:(x+y-z)^3n*(z-x-y)^2n*(x-z+y)^5n(n为正整数)
积的乘方 (-x^n)^2(-y^n)^3-(x^2y^3)^n
分解因式:-2X^(5n+1)Y^n+4X^(3n+1)Y^(n+2)-2X^(n+1)Y^(n+4)
计算:【(x-y)/(m-n)】的立方×【(n-m)/(y-x)】的四次方×【(2m-2n)/3y-3x】的平方
计算(1)(3m-4n)(3m+4n)-(2m-2n)(2m+n) (2)(x+5y)²-(x-5y)
把下列各式因式分解(2m+3n)(2m-n)-4n(2m-n)(x+y)^2(x-y)+(x+y)(y-x)^24a(x
1.计算1(m+2n)(m-2n);2(2n+5)(n-3);3(x+2y)²;4(2x+b)(3x+d);
单项式除以单项式 -x^n-2y^n+1÷(-4x^n-4y^n-3)
若1+2+……+n=k,试探求:(x^n*y)*(x^(n-1)*y^2)*(x^(n-2)*y^3)*……*(x*y^
若1+2+3+...+n=a,求代数式(x^ny)(x^n-1y^2)(x^n-2y^3)...(x^2y^n-1)(x