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