星期几的英语缩写:x^11x^18/[-x(-x^2)^3]^4==???

(x*x*x-x*x+x)/(x*x*x+1)+(x*x+x+1)/[(1-x*x)/x)] (x*x*x-x*x+x)/(x*x*x+1)+(x*x+x+1)/[(1-x*x)/x)] x^11x^18/[-x(-x^2)^3]^4==??? 问几道题目：1.(2*x*x*x+x*x-11x-5)/(x+2)的余式是 . 2x^5-5x^4-11x^3+23x^2+9x-18 已知x*x-3x+1=0，求x*x+1/x*x x+x1+x=11x 1/x(x-1)+1/x(x+1)+1/(x+1)(x+20........+1/(x+9)(x+10)=11/12 解一元二次方程X*X+1/X*X+X+1/X=0 分解因式 x.x.x.x+16-16x.x