q 28 + q 22 − 2 q 20 − q 18 − q 16 − q 14 + q 12 + 2 q 8 + q 6 + 2 q 2 {\displaystyle q^{28}+q^{22}-2q^{20}-q^{18}-q^{16}-q^{14}+q^{12}+2q^{8}+q^{6}+2q^{2}}
