− q 11 / 2 + q 9 / 2 − q 7 / 2 + q 5 / 2 − q 3 / 2 + q − 1 q − 1 q 5 / 2 {\displaystyle -q^{11/2}+q^{9/2}-q^{7/2}+q^{5/2}-q^{3/2}+{\sqrt {q}}-{\frac {1}{\sqrt {q}}}-{\frac {1}{q^{5/2}}}}
