q 3 / 2 − 4 q + 7 q − 12 q 3 / 2 + 16 q 5 / 2 − 19 q 7 / 2 + 18 q 9 / 2 − 16 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 {7}{\sqrt {q}}}-{\frac {12}{q^{3/2}}}+{\frac {16}{q^{5/2}}}-{\frac {19}{q^{7/2}}}+{\frac {18}{q^{9/2}}}-{\frac {16}{q^{11/2}}}+{\frac {12}{q^{13/2}}}-{\frac {7}{q^{15/2}}}+{\frac {3}{q^{17/2}}}-{\frac {1}{q^{19/2}}}}
