− q 13 / 2 + 3 q 11 / 2 − 6 q 9 / 2 + 9 q 7 / 2 − 12 q 5 / 2 + 12 q 3 / 2 − 11 q + 9 q − 6 q 3 / 2 + 2 q 5 / 2 − 1 q 7 / 2 {\displaystyle -q^{13/2}+3q^{11/2}-6q^{9/2}+9q^{7/2}-12q^{5/2}+12q^{3/2}-11{\sqrt {q}}+{\frac {9}{\sqrt {q}}}-{\frac {6}{q^{3/2}}}+{\frac {2}{q^{5/2}}}-{\frac {1}{q^{7/2}}}}
