q 19 t 7 + q 15 t 6 + 2 q 15 t 5 + q 13 t 4 + 2 q 11 t 4 + q 11 t 3 + q 9 t 3 + q 9 t 2 + q 7 t 2 + q 5 t + q 5 + q 3 {\displaystyle q^{19}t^{7}+q^{15}t^{6}+2q^{15}t^{5}+q^{13}t^{4}+2q^{11}t^{4}+q^{11}t^{3}+q^{9}t^{3}+q^{9}t^{2}+q^{7}t^{2}+q^{5}t+q^{5}+q^{3}}
