11 q 9 / 2 − 13 q 7 / 2 + 6 q 5 / 2 − 4 q 3 / 2 + q 21 / 2 − 2 q 19 / 2 + 6 q 17 / 2 − 10 q 15 / 2 + 12 q 13 / 2 − 15 q 11 / 2 {\displaystyle 11q^{9/2}-13q^{7/2}+6q^{5/2}-4q^{3/2}+q^{21/2}-2q^{19/2}+6q^{17/2}-10q^{15/2}+12q^{13/2}-15q^{11/2}}
