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