− q 13 / 2 + 5 q 11 / 2 − 9 q 9 / 2 + 13 q 7 / 2 − 16 q 5 / 2 + 17 q 3 / 2 − 16 q + 11 q − 8 q 3 / 2 + 3 q 5 / 2 − 1 q 7 / 2 {\displaystyle -q^{13/2}+5q^{11/2}-9q^{9/2}+13q^{7/2}-16q^{5/2}+17q^{3/2}-16{\sqrt {q}}+{\frac {11}{\sqrt {q}}}-{\frac {8}{q^{3/2}}}+{\frac {3}{q^{5/2}}}-{\frac {1}{q^{7/2}}}}
