q 12 − 5 q 11 + 13 q 10 − 23 q 9 + 32 q 8 − 40 q 7 + 42 q 6 − 38 q 5 + 31 q 4 − 20 q 3 + 11 q 2 − 4 q + 1 {\displaystyle q^{12}-5q^{11}+13q^{10}-23q^{9}+32q^{8}-40q^{7}+42q^{6}-38q^{5}+31q^{4}-20q^{3}+11q^{2}-4q+1}
