q 3 / 2 − 3 q + 6 q − 12 q 3 / 2 + 15 q 5 / 2 − 19 q 7 / 2 + 19 q 9 / 2 − 17 q 11 / 2 + 13 q 13 / 2 − 8 q 15 / 2 + 4 q 17 / 2 − 1 q 19 / 2 {\displaystyle q^{3/2}-3{\sqrt {q}}+{\frac {6}{\sqrt {q}}}-{\frac {12}{q^{3/2}}}+{\frac {15}{q^{5/2}}}-{\frac {19}{q^{7/2}}}+{\frac {19}{q^{9/2}}}-{\frac {17}{q^{11/2}}}+{\frac {13}{q^{13/2}}}-{\frac {8}{q^{15/2}}}+{\frac {4}{q^{17/2}}}-{\frac {1}{q^{19/2}}}}
