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