计算【-2(-x^n-1)】^3
计算【-2(-x^n-1)】^3
计算(x^(2n)+x^n+1)(x^(3n)-x^(2n)+1)
计算:(x^3)^n÷x^2n÷x^n-1
计算:(1)(m-n)^2*(n-m)^5*(m-n)^5 (2)(-x)^2*x^3+2x^3*(-x)^2-x*x^
1.计算1(m+2n)(m-2n);2(2n+5)(n-3);3(x+2y)²;4(2x+b)(3x+d);
计算x^3n/(x^2-1)-x^2n/(x^n+1)-1/(x^n-1)+1/(x^n+1)
计算:1/(x-1)+1/(x-1)(x-2)+1/(x-2)(x-3)+.+1/(x-n)(x-n-1)
计算(-x)^2n十1.(-x)^n+1
几道分式计算.【1】[1/(m+n)^2-1/(m-n)^2]÷(1/m+n-1/m-n)【2】2/3x-(2/x+y)
计算(1)(3m-4n)(3m+4n)-(2m-2n)(2m+n) (2)(x+5y)²-(x-5y)
计算:(1)(t^4 )^2 *t^3/(-t)^8 (2)(-x)^3n/(-x)^2n
计算(1)2(x+1)^2+4(-x-1) (2)(4x^2+3x)^2-(x+1)^2 (3)-a(m-n)+(m-n