q 9 / 2 − 4 q 7 / 2 + 8 q 5 / 2 − 13 q 3 / 2 + 15 q − 17 q + 15 q 3 / 2 − 12 q 5 / 2 + 8 q 7 / 2 − 3 q 9 / 2 {\displaystyle q^{9/2}-4q^{7/2}+8q^{5/2}-13q^{3/2}+15{\sqrt {q}}-{\frac {17}{\sqrt {q}}}+{\frac {15}{q^{3/2}}}-{\frac {12}{q^{5/2}}}+{\frac {8}{q^{7/2}}}-{\frac {3}{q^{9/2}}}}
