q 9 / 2 − 4 q 7 / 2 + 7 q 5 / 2 − 10 q 3 / 2 + 13 q − 15 q + 14 q 3 / 2 − 12 q 5 / 2 + 8 q 7 / 2 − 5 q 9 / 2 + 2 q 11 / 2 − 1 q 13 / 2 {\displaystyle q^{9/2}-4q^{7/2}+7q^{5/2}-10q^{3/2}+13{\sqrt {q}}-{\frac {15}{\sqrt {q}}}+{\frac {14}{q^{3/2}}}-{\frac {12}{q^{5/2}}}+{\frac {8}{q^{7/2}}}-{\frac {5}{q^{9/2}}}+{\frac {2}{q^{11/2}}}-{\frac {1}{q^{13/2}}}}
