q 15 / 2 − 2 q 13 / 2 + 3 q 11 / 2 − 4 q 9 / 2 + 3 q 7 / 2 − 3 q 5 / 2 + 2 q 3 / 2 − q − 1 q + 1 q 3 / 2 − 1 q 5 / 2 {\displaystyle q^{15/2}-2q^{13/2}+3q^{11/2}-4q^{9/2}+3q^{7/2}-3q^{5/2}+2q^{3/2}-{\sqrt {q}}-{\frac {1}{\sqrt {q}}}+{\frac {1}{q^{3/2}}}-{\frac {1}{q^{5/2}}}}
