− q 50 − q 36 − q 32 − q 30 + q 26 + q 22 + 2 q 20 + q 18 + q 16 + q 14 + q 12 {\displaystyle -q^{50}-q^{36}-q^{32}-q^{30}+q^{26}+q^{22}+2q^{20}+q^{18}+q^{16}+q^{14}+q^{12}}
