− q 27 − q 25 − q 23 + q 17 + q 15 + q 13 + q 11 + q 9 + q 7 + q 3 {\displaystyle -q^{27}-q^{25}-q^{23}+q^{17}+q^{15}+q^{13}+q^{11}+q^{9}+q^{7}+q^{3}}
