− q 5 / 2 + 3 q 3 / 2 − 7 q + 11 q − 15 q 3 / 2 + 17 q 5 / 2 − 18 q 7 / 2 + 15 q 9 / 2 − 12 q 11 / 2 + 7 q 13 / 2 − 3 q 15 / 2 + 1 q 17 / 2 {\displaystyle -q^{5/2}+3q^{3/2}-7{\sqrt {q}}+{\frac {11}{\sqrt {q}}}-{\frac {15}{q^{3/2}}}+{\frac {17}{q^{5/2}}}-{\frac {18}{q^{7/2}}}+{\frac {15}{q^{9/2}}}-{\frac {12}{q^{11/2}}}+{\frac {7}{q^{13/2}}}-{\frac {3}{q^{15/2}}}+{\frac {1}{q^{17/2}}}}
