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