q 3 / 2 − 4 q + 8 q − 13 q 3 / 2 + 17 q 5 / 2 − 20 q 7 / 2 + 19 q 9 / 2 − 17 q 11 / 2 + 12 q 13 / 2 − 7 q 15 / 2 + 3 q 17 / 2 − 1 q 19 / 2 {\displaystyle q^{3/2}-4{\sqrt {q}}+{\frac {8}{\sqrt {q}}}-{\frac {13}{q^{3/2}}}+{\frac {17}{q^{5/2}}}-{\frac {20}{q^{7/2}}}+{\frac {19}{q^{9/2}}}-{\frac {17}{q^{11/2}}}+{\frac {12}{q^{13/2}}}-{\frac {7}{q^{15/2}}}+{\frac {3}{q^{17/2}}}-{\frac {1}{q^{19/2}}}}
