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