− q 13 / 2 + 5 q 11 / 2 − 11 q 9 / 2 + 17 q 7 / 2 − 23 q 5 / 2 + 26 q 3 / 2 − 26 q + 21 q − 16 q 3 / 2 + 9 q 5 / 2 − 4 q 7 / 2 + 1 q 9 / 2 {\displaystyle -q^{13/2}+5q^{11/2}-11q^{9/2}+17q^{7/2}-23q^{5/2}+26q^{3/2}-26{\sqrt {q}}+{\frac {21}{\sqrt {q}}}-{\frac {16}{q^{3/2}}}+{\frac {9}{q^{5/2}}}-{\frac {4}{q^{7/2}}}+{\frac {1}{q^{9/2}}}}
