(1) n^4+4(2) x^5+x+1(2) a^3+2a^2-12a+15注：^表示次方这是老师的作业

(4x^n-2x^n-1-3x^n+2)÷（-5x^n-1) x^n-1(3x^n+4x^n+1-5x^n+2) 因式分解4x^(n+2)-9x^n+6x^(n-1)-x^(n-2) 因式分解4x^n+2-9x^n+6x^n-1-x^n-2 因式分解：x^(2n)+(2x)^(n)+4^(n-1) x^2n+(2x)^n+4^(n-1) 因式分解 求 4/(x+1)(x+3) + 4/(x+3)(x+5) +.+ 4/(x+2n-1)(x+2n+1) (8x^n+1-3x^n-1)-2(-x+9x^n+1-4x^n)= 4x的4次方+1（因式分解）快X^5N+X^N+1(X^2+X+1)(X^2-6X+1)+12x^2 求和Sn=(x-1)+(x^3-2)+(x^5-3)+(x^7-4)+…+(x^2n-1-n) 4x^n+2-9x^n+6x^n-1-x^n-24x^(n+2)-9x^n+6x^(n-1)-x^(n-2),n是整数且大于2 已知4x+1=m(x-2)+n(x-5),求m,n的值 计算：(1)（m-n)^2*(n-m)^5*(m-n)^5 (2)(-x)^2*x^3+2x^3*(-x）^2-x*x^4 12x^2n+1-4x^2n因式分解 计算x^n·x^n+1+x^n+1·x^n+2+(-x)^3·(-x)^2n-4急在线等速度Rt 10x^20-6x^n+(x^n+1-9x^2n)-(4x^n+x^n+1)等于多少 分解因式-2x^(5n-1)y^n+4x^(3n-1)y^(n+2)-2x^(n-1)y^(n+4) 分解因式：-2X^(5n+1)Y^n+4X^(3n+1)Y^(n+2)-2X^(n+1)Y^(n+4)