2 q 15 / 2 − 2 q 13 / 2 + 2 q 11 / 2 − 4 q 9 / 2 + 2 q 7 / 2 − 3 q 5 / 2 + 2 q 3 / 2 − q {\displaystyle 2q^{15/2}-2q^{13/2}+2q^{11/2}-4q^{9/2}+2q^{7/2}-3q^{5/2}+2q^{3/2}-{\sqrt {q}}}
