(x^2)^n+1)=x^[2×(n+1)=x^(2n+2)x的n次方×x的n+1次方×（-x）的2n次方×x+（-x）的2n+3次方×x的2n-2次方×x=x的n次方×x的n+1次方×x的2n次方×x-x的2n+3次方×x的2n-2次方×x=x^(n+n+1+2n+1)-x^(2n+3+2n-2+1)=x^...