2 q 13 / 2 − 5 q 11 / 2 + 7 q 9 / 2 − 9 q 7 / 2 + 9 q 5 / 2 − 9 q 3 / 2 + 7 q − 5 q + 2 q 3 / 2 − 1 q 5 / 2 {\displaystyle 2q^{13/2}-5q^{11/2}+7q^{9/2}-9q^{7/2}+9q^{5/2}-9q^{3/2}+7{\sqrt {q}}-{\frac {5}{\sqrt {q}}}+{\frac {2}{q^{3/2}}}-{\frac {1}{q^{5/2}}}}
