q 9 / 2 − 3 q 7 / 2 + 7 q 5 / 2 − 13 q 3 / 2 + 14 q − 18 q + 14 q 3 / 2 − 14 q 5 / 2 + 8 q 7 / 2 − 4 q 9 / 2 {\displaystyle q^{9/2}-3q^{7/2}+7q^{5/2}-13q^{3/2}+14{\sqrt {q}}-{\frac {18}{\sqrt {q}}}+{\frac {14}{q^{3/2}}}-{\frac {14}{q^{5/2}}}+{\frac {8}{q^{7/2}}}-{\frac {4}{q^{9/2}}}}
