x-1分之1-(x+(1-x)的平方分之1)÷(x的平方－1)分之(x的平方－x－1)=1/(x-1)-(x+1/(x-1)^2)×(x^2-1)/(x^2-x-1)=1/(x-1)-[x(x-1)^2+1]/(x-1)^2]×(x^2-1)/(x^2-x-1)=1/(x-1)-[(x^3-2x^2+x+1]/(x-1)^2]×(x-1)(x+1)/(x...