− q 13 / 2 + 5 q 11 / 2 − 11 q 9 / 2 + 17 q 7 / 2 − 23 q 5 / 2 + 25 q 3 / 2 − 25 q + 20 q − 15 q 3 / 2 + 8 q 5 / 2 − 3 q 7 / 2 + 1 q 9 / 2 {\displaystyle -q^{13/2}+5q^{11/2}-11q^{9/2}+17q^{7/2}-23q^{5/2}+25q^{3/2}-25{\sqrt {q}}+{\frac {20}{\sqrt {q}}}-{\frac {15}{q^{3/2}}}+{\frac {8}{q^{5/2}}}-{\frac {3}{q^{7/2}}}+{\frac {1}{q^{9/2}}}}
