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