− q 7 / 2 + 4 q 5 / 2 − 8 q 3 / 2 + 12 q − 15 q + 16 q 3 / 2 − 15 q 5 / 2 + 11 q 7 / 2 − 8 q 9 / 2 + 3 q 11 / 2 − 1 q 13 / 2 {\displaystyle -q^{7/2}+4q^{5/2}-8q^{3/2}+12{\sqrt {q}}-{\frac {15}{\sqrt {q}}}+{\frac {16}{q^{3/2}}}-{\frac {15}{q^{5/2}}}+{\frac {11}{q^{7/2}}}-{\frac {8}{q^{9/2}}}+{\frac {3}{q^{11/2}}}-{\frac {1}{q^{13/2}}}}
