q 9 / 2 − 2 q 7 / 2 + 4 q 5 / 2 − 7 q 3 / 2 + 8 q − 9 q + 8 q 3 / 2 − 7 q 5 / 2 + 4 q 7 / 2 − 2 q 9 / 2 {\displaystyle q^{9/2}-2q^{7/2}+4q^{5/2}-7q^{3/2}+8{\sqrt {q}}-{\frac {9}{\sqrt {q}}}+{\frac {8}{q^{3/2}}}-{\frac {7}{q^{5/2}}}+{\frac {4}{q^{7/2}}}-{\frac {2}{q^{9/2}}}}
