q 3 / 2 − 4 q + 9 q − 15 q 3 / 2 + 18 q 5 / 2 − 22 q 7 / 2 + 21 q 9 / 2 − 18 q 11 / 2 + 13 q 13 / 2 − 7 q 15 / 2 + 3 q 17 / 2 − 1 q 19 / 2 {\displaystyle q^{3/2}-4{\sqrt {q}}+{\frac {9}{\sqrt {q}}}-{\frac {15}{q^{3/2}}}+{\frac {18}{q^{5/2}}}-{\frac {22}{q^{7/2}}}+{\frac {21}{q^{9/2}}}-{\frac {18}{q^{11/2}}}+{\frac {13}{q^{13/2}}}-{\frac {7}{q^{15/2}}}+{\frac {3}{q^{17/2}}}-{\frac {1}{q^{19/2}}}}
