计算:m+1+m^2/4 计算:n^2/9-2/3n+1 计算:-x^3-2x^2-x
计算:(m+2n)/(n-m)+n/(m-n)-2m(n-m)和[(x+2)/(x×x-2x)-(x-1)/(x×x-4
计算:(1)(m-n)^2*(n-m)^5*(m-n)^5 (2)(-x)^2*x^3+2x^3*(-x)^2-x*x^
计算(1)(3m-4n)(3m+4n)-(2m-2n)(2m+n) (2)(x+5y)²-(x-5y)
已知x^m=3x^n=2,请计算x^(2m+3n)
1.计算1(m+2n)(m-2n);2(2n+5)(n-3);3(x+2y)²;4(2x+b)(3x+d);
计算:1.[(m+n)(n-m)-(m+n)^2+3m(m+n)]除以(-2M),其中m=-4,n=2 2.(x+y)(
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)2(x+1)^2+4(-x-1) (2)(4x^2+3x)^2-(x+1)^2 (3)-a(m-n)+(m-n
、计算:x^3m+2n÷x^m+n=
计算:(x/y^3)^-2 计算:m+n/m-n除以mn+m^2/2m
计算(x^(2n)+x^n+1)(x^(3n)-x^(2n)+1)
计算【-2(-x^n-1)】^3