q 17 t 7 + q 13 t 6 + 2 q 13 t 5 + q 11 t 4 + 2 q 9 t 4 + q 9 t 3 + q 7 t 3 + 2 q 7 t 2 + q 5 t 2 + 2 q 3 t + q 3 + q {\displaystyle q^{17}t^{7}+q^{13}t^{6}+2q^{13}t^{5}+q^{11}t^{4}+2q^{9}t^{4}+q^{9}t^{3}+q^{7}t^{3}+2q^{7}t^{2}+q^{5}t^{2}+2q^{3}t+q^{3}+q}