z 6 a 6 + z 6 a 8 + z 5 a 5 + 2 z 5 a 7 + z 5 a 9 + z 4 a 4 − 3 z 4 a 6 − 3 z 4 a 8 + z 4 a 10 − 2 z 3 a 5 − 4 z 3 a 7 − z 3 a 9 + z 3 a 11 − 3 z 2 a 4 + 4 z 2 a 6 + 6 z 2 a 8 − z 2 a 10 + 3 z a 7 + z a 9 − 2 z a 11 + 1 a 4 − 2 a 6 − 2 a 8 {\displaystyle {\frac {z^{6}}{a^{6}}}+{\frac {z^{6}}{a^{8}}}+{\frac {z^{5}}{a^{5}}}+{\frac {2z^{5}}{a^{7}}}+{\frac {z^{5}}{a^{9}}}+{\frac {z^{4}}{a^{4}}}-{\frac {3z^{4}}{a^{6}}}-{\frac {3z^{4}}{a^{8}}}+{\frac {z^{4}}{a^{10}}}-{\frac {2z^{3}}{a^{5}}}-{\frac {4z^{3}}{a^{7}}}-{\frac {z^{3}}{a^{9}}}+{\frac {z^{3}}{a^{11}}}-{\frac {3z^{2}}{a^{4}}}+{\frac {4z^{2}}{a^{6}}}+{\frac {6z^{2}}{a^{8}}}-{\frac {z^{2}}{a^{10}}}+{\frac {3z}{a^{7}}}+{\frac {z}{a^{9}}}-{\frac {2z}{a^{11}}}+{\frac {1}{a^{4}}}-{\frac {2}{a^{6}}}-{\frac {2}{a^{8}}}}
