1 q 2 − 2 q 3 + 5 q 4 − 5 q 5 + 6 q 6 − 6 q 7 + 4 q 8 − 3 q 9 + 1 q 10 {\displaystyle {\frac {1}{q^{2}}}-{\frac {2}{q^{3}}}+{\frac {5}{q^{4}}}-{\frac {5}{q^{5}}}+{\frac {6}{q^{6}}}-{\frac {6}{q^{7}}}+{\frac {4}{q^{8}}}-{\frac {3}{q^{9}}}+{\frac {1}{q^{10}}}}