q 13 / 2 − 2 q 11 / 2 + 4 q 9 / 2 − 8 q 7 / 2 + 9 q 5 / 2 − 12 q 3 / 2 + 12 q − 11 q + 9 q 3 / 2 − 6 q 5 / 2 + 3 q 7 / 2 − 1 q 9 / 2 {\displaystyle q^{13/2}-2q^{11/2}+4q^{9/2}-8q^{7/2}+9q^{5/2}-12q^{3/2}+12{\sqrt {q}}-{\frac {11}{\sqrt {q}}}+{\frac {9}{q^{3/2}}}-{\frac {6}{q^{5/2}}}+{\frac {3}{q^{7/2}}}-{\frac {1}{q^{9/2}}}}
