x^(5/2)-x^(1/2) 怎么算

(x-1)(x-2)(x-3)(x-4)-(x^2-5x)^2-10(x^2-5x)怎么算? lim (x->1) (x^2-6x+8)/(x^2-5x+4) 怎么算? (x+2)(x+3)-(x+6)(x-1) 怎么算? (x^10-x^5+1)/(x^2+x+1) 怎么算?(x^10-x^5+1)/(x^2+x+1)=（x^8-x^7+x^5-x^4+x^3-x+1) lim (x->1) (x^2-6x+8)/(x^2-5x+4) 怎么算怎么算的 题没有 x-1/x-2-x-3/x-4=x-2/x-3-x-4/x-5怎么做? x^8+x^7+x^6+x^5+x^4+x^3+x^2+x+1怎么分解因式 1/(1-x)+1/(1+x)+2/(1+x*x)+4/(1+x*x*x*x)+8/(1-x*x*x*x*x*x*x*x)怎么做 x^2-x +1 和 x^2-2x+5 十字相乘怎么算? 2X=5X怎么算? 2x=5x 怎么算 (x^2-3x+1)^3怎么算出x^6-9x^5+30x^4-45x^3+30x^2-9x+1 (x+5)^2=10+（x+5)x怎么算 (x+1)(x-2)-(x-1)的平方怎么算? (X-3)/(X^2-4)*(X^2-4X+4)/(x^2-x-6)-1/(x+2)怎么算?(X-3)/(X^2-4)*(X^2-4X+4)/(x^2-x-6)-1/(x+2),怎么算? x(x-2)+m(1-x)=3怎么算 y+(1+x)(2+x)(3+x)导数怎么算, x/x-1+2=5/x-1怎么做?