q 15 / 2 − 3 q 13 / 2 + 7 q 11 / 2 − 12 q 9 / 2 + 16 q 7 / 2 − 20 q 5 / 2 + 19 q 3 / 2 − 17 q + 13 q − 8 q 3 / 2 + 3 q 5 / 2 − 1 q 7 / 2 {\displaystyle q^{15/2}-3q^{13/2}+7q^{11/2}-12q^{9/2}+16q^{7/2}-20q^{5/2}+19q^{3/2}-17{\sqrt {q}}+{\frac {13}{\sqrt {q}}}-{\frac {8}{q^{3/2}}}+{\frac {3}{q^{5/2}}}-{\frac {1}{q^{7/2}}}}
