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