− q + 4 q − 8 q 3 / 2 + 11 q 5 / 2 − 15 q 7 / 2 + 16 q 9 / 2 − 16 q 11 / 2 + 12 q 13 / 2 − 9 q 15 / 2 + 5 q 17 / 2 − 2 q 19 / 2 + 1 q 21 / 2 {\displaystyle -{\sqrt {q}}+{\frac {4}{\sqrt {q}}}-{\frac {8}{q^{3/2}}}+{\frac {11}{q^{5/2}}}-{\frac {15}{q^{7/2}}}+{\frac {16}{q^{9/2}}}-{\frac {16}{q^{11/2}}}+{\frac {12}{q^{13/2}}}-{\frac {9}{q^{15/2}}}+{\frac {5}{q^{17/2}}}-{\frac {2}{q^{19/2}}}+{\frac {1}{q^{21/2}}}}
