− 1 q 9 / 2 − 1 q 5 / 2 + 1 q 19 / 2 − 1 q 17 / 2 + 1 q 15 / 2 − 1 q 13 / 2 + 1 q 11 / 2 − 1 q {\displaystyle -{\frac {1}{q^{9/2}}}-{\frac {1}{q^{5/2}}}+{\frac {1}{q^{19/2}}}-{\frac {1}{q^{17/2}}}+{\frac {1}{q^{15/2}}}-{\frac {1}{q^{13/2}}}+{\frac {1}{q^{11/2}}}-{\frac {1}{\sqrt {q}}}}
