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