− 1 q 7 / 2 + 1 q 27 / 2 − 2 q 25 / 2 + 3 q 23 / 2 − 3 q 21 / 2 + 4 q 19 / 2 − 4 q 17 / 2 + 2 q 15 / 2 − 2 q 13 / 2 {\displaystyle -{\frac {1}{q^{7/2}}}+{\frac {1}{q^{27/2}}}-{\frac {2}{q^{25/2}}}+{\frac {3}{q^{23/2}}}-{\frac {3}{q^{21/2}}}+{\frac {4}{q^{19/2}}}-{\frac {4}{q^{17/2}}}+{\frac {2}{q^{15/2}}}-{\frac {2}{q^{13/2}}}}
