q 15 / 2 − 2 q 13 / 2 + 3 q 11 / 2 − 4 q 9 / 2 + 5 q 7 / 2 − 6 q 5 / 2 + 4 q 3 / 2 − 4 q + 2 q − 1 q 3 / 2 {\displaystyle q^{15/2}-2q^{13/2}+3q^{11/2}-4q^{9/2}+5q^{7/2}-6q^{5/2}+4q^{3/2}-4{\sqrt {q}}+{\frac {2}{\sqrt {q}}}-{\frac {1}{q^{3/2}}}}
