− q 7 / 2 + 4 q 5 / 2 − 9 q 3 / 2 + 15 q − 21 q + 22 q 3 / 2 − 24 q 5 / 2 + 20 q 7 / 2 − 14 q 9 / 2 + 9 q 11 / 2 − 4 q 13 / 2 + 1 q 15 / 2 {\displaystyle -q^{7/2}+4q^{5/2}-9q^{3/2}+15{\sqrt {q}}-{\frac {21}{\sqrt {q}}}+{\frac {22}{q^{3/2}}}-{\frac {24}{q^{5/2}}}+{\frac {20}{q^{7/2}}}-{\frac {14}{q^{9/2}}}+{\frac {9}{q^{11/2}}}-{\frac {4}{q^{13/2}}}+{\frac {1}{q^{15/2}}}}
