− q 19 / 2 + 4 q 17 / 2 − 9 q 15 / 2 + 15 q 13 / 2 − 20 q 11 / 2 + 23 q 9 / 2 − 23 q 7 / 2 + 19 q 5 / 2 − 15 q 3 / 2 + 8 q − 4 q + 1 q 3 / 2 {\displaystyle -q^{19/2}+4q^{17/2}-9q^{15/2}+15q^{13/2}-20q^{11/2}+23q^{9/2}-23q^{7/2}+19q^{5/2}-15q^{3/2}+8{\sqrt {q}}-{\frac {4}{\sqrt {q}}}+{\frac {1}{q^{3/2}}}}
