− q 11 / 2 + 4 q 9 / 2 − 8 q 7 / 2 + 13 q 5 / 2 − 18 q 3 / 2 + 20 q − 21 q + 18 q 3 / 2 − 14 q 5 / 2 + 8 q 7 / 2 − 4 q 9 / 2 + 1 q 11 / 2 {\displaystyle -q^{11/2}+4q^{9/2}-8q^{7/2}+13q^{5/2}-18q^{3/2}+20{\sqrt {q}}-{\frac {21}{\sqrt {q}}}+{\frac {18}{q^{3/2}}}-{\frac {14}{q^{5/2}}}+{\frac {8}{q^{7/2}}}-{\frac {4}{q^{9/2}}}+{\frac {1}{q^{11/2}}}}
