− q 13 / 2 + 2 q 11 / 2 − 2 q 9 / 2 + 3 q 7 / 2 − 2 q 5 / 2 + 2 q 3 / 2 − 2 q − 1 q − 1 q 5 / 2 {\displaystyle -q^{13/2}+2q^{11/2}-2q^{9/2}+3q^{7/2}-2q^{5/2}+2q^{3/2}-2{\sqrt {q}}-{\frac {1}{\sqrt {q}}}-{\frac {1}{q^{5/2}}}}
