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