2 t 3 − 3 t 2 + t + 1 + 1 t − 3 t 2 + 2 t 3 {\displaystyle 2t^{3}-3t^{2}+t+1+{\frac {1}{t}}-{\frac {3}{t^{2}}}+{\frac {2}{t^{3}}}}
