21 q 9 / 2 − 19 q 7 / 2 + 14 q 5 / 2 − 9 q 3 / 2 + 1 q 21 / 2 − 3 q 19 / 2 + 7 q 17 / 2 − 13 q 15 / 2 + 17 q 13 / 2 − 21 q 11 / 2 − q + 4 q {\displaystyle {\frac {21}{q^{9/2}}}-{\frac {19}{q^{7/2}}}+{\frac {14}{q^{5/2}}}-{\frac {9}{q^{3/2}}}+{\frac {1}{q^{21/2}}}-{\frac {3}{q^{19/2}}}+{\frac {7}{q^{17/2}}}-{\frac {13}{q^{15/2}}}+{\frac {17}{q^{13/2}}}-{\frac {21}{q^{11/2}}}-{\sqrt {q}}+{\frac {4}{\sqrt {q}}}}
