q 3 − q 2 + 2 q − 3 + 3 q − 3 q 2 + 3 q 3 − 2 q 4 + 1 q 5 {\displaystyle q^{3}-q^{2}+2q-3+{\frac {3}{q}}-{\frac {3}{q^{2}}}+{\frac {3}{q^{3}}}-{\frac {2}{q^{4}}}+{\frac {1}{q^{5}}}}
