− q 14 + 3 q 13 − 5 q 12 + 6 q 11 − 7 q 10 + 6 q 9 − 5 q 8 + 3 q 7 + q 4 {\displaystyle -q^{14}+3q^{13}-5q^{12}+6q^{11}-7q^{10}+6q^{9}-5q^{8}+3q^{7}+q^{4}}
