18 q 9 / 2 − 16 q 7 / 2 + 11 q 5 / 2 − 7 q 3 / 2 + q 21 / 2 − 4 q 19 / 2 + 8 q 17 / 2 − 12 q 15 / 2 + 16 q 13 / 2 − 19 q 11 / 2 + 3 q − 1 q {\displaystyle 18q^{9/2}-16q^{7/2}+11q^{5/2}-7q^{3/2}+q^{21/2}-4q^{19/2}+8q^{17/2}-12q^{15/2}+16q^{13/2}-19q^{11/2}+3{\sqrt {q}}-{\frac {1}{\sqrt {q}}}}
