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