− q 7 / 2 + 5 q 5 / 2 − 11 q 3 / 2 + 15 q − 20 q + 20 q 3 / 2 − 19 q 5 / 2 + 15 q 7 / 2 − 9 q 9 / 2 + 4 q 11 / 2 − 1 q 13 / 2 {\displaystyle -q^{7/2}+5q^{5/2}-11q^{3/2}+15{\sqrt {q}}-{\frac {20}{\sqrt {q}}}+{\frac {20}{q^{3/2}}}-{\frac {19}{q^{5/2}}}+{\frac {15}{q^{7/2}}}-{\frac {9}{q^{9/2}}}+{\frac {4}{q^{11/2}}}-{\frac {1}{q^{13/2}}}}
