x3+x−2+1x^{3}+x^{-2}+1x3+x−2+1
x3+3x2+2x^{3}+3 x^{2}+2x3+3x2+2
1+x+x2+.....1+x+x^{2}+.....1+x+x2+.....
x3+2x2+x1/2+1x^{3}+2 x^{2}+x^{1 / 2}+1x3+2x2+x1/2+1