− q 7 / 2 + 3 q 5 / 2 − 6 q 3 / 2 + 9 q − 13 q + 14 q 3 / 2 − 14 q 5 / 2 + 11 q 7 / 2 − 9 q 9 / 2 + 5 q 11 / 2 − 2 q 13 / 2 + 1 q 15 / 2 {\displaystyle -q^{7/2}+3q^{5/2}-6q^{3/2}+9{\sqrt {q}}-{\frac {13}{\sqrt {q}}}+{\frac {14}{q^{3/2}}}-{\frac {14}{q^{5/2}}}+{\frac {11}{q^{7/2}}}-{\frac {9}{q^{9/2}}}+{\frac {5}{q^{11/2}}}-{\frac {2}{q^{13/2}}}+{\frac {1}{q^{15/2}}}}