9 q 9 / 2 − 8 q 7 / 2 + 5 q 5 / 2 − 2 q 3 / 2 + 1 q 21 / 2 − 2 q 19 / 2 + 5 q 17 / 2 − 8 q 15 / 2 + 9 q 13 / 2 − 11 q 11 / 2 {\displaystyle {\frac {9}{q^{9/2}}}-{\frac {8}{q^{7/2}}}+{\frac {5}{q^{5/2}}}-{\frac {2}{q^{3/2}}}+{\frac {1}{q^{21/2}}}-{\frac {2}{q^{19/2}}}+{\frac {5}{q^{17/2}}}-{\frac {8}{q^{15/2}}}+{\frac {9}{q^{13/2}}}-{\frac {11}{q^{11/2}}}}
