− t 3 + 5 t 2 − 10 t + 13 − 10 t + 5 t 2 − 1 t 3 {\displaystyle -t^{3}+5t^{2}-10t+13-{\frac {10}{t}}+{\frac {5}{t^{2}}}-{\frac {1}{t^{3}}}}
