q 15 / 2 − 2 q 13 / 2 + 5 q 11 / 2 − 6 q 9 / 2 + 5 q 7 / 2 − 7 q 5 / 2 + 3 q 3 / 2 − 5 q − 1 q − 1 q 5 / 2 {\displaystyle q^{15/2}-2q^{13/2}+5q^{11/2}-6q^{9/2}+5q^{7/2}-7q^{5/2}+3q^{3/2}-5{\sqrt {q}}-{\frac {1}{\sqrt {q}}}-{\frac {1}{q^{5/2}}}}
