− q 19 / 2 + 4 q 17 / 2 − 9 q 15 / 2 + 16 q 13 / 2 − 21 q 11 / 2 + 24 q 9 / 2 − 25 q 7 / 2 + 20 q 5 / 2 − 16 q 3 / 2 + 9 q − 4 q + 1 q 3 / 2 {\displaystyle -q^{19/2}+4q^{17/2}-9q^{15/2}+16q^{13/2}-21q^{11/2}+24q^{9/2}-25q^{7/2}+20q^{5/2}-16q^{3/2}+9{\sqrt {q}}-{\frac {4}{\sqrt {q}}}+{\frac {1}{q^{3/2}}}}
