z 7 a 3 + z 7 a 5 + z 6 a 2 + 4 z 6 a 4 + 3 z 6 a 6 − 3 z 5 a 3 + z 5 a 5 + 4 z 5 a 7 − 5 z 4 a 2 − 15 z 4 a 4 − 7 z 4 a 6 + 3 z 4 a 8 − 10 z 3 a 5 − 8 z 3 a 7 + 2 z 3 a 9 + 8 z 2 a 2 + 15 z 2 a 4 + 4 z 2 a 6 − 2 z 2 a 8 + z 2 a 10 + 3 z a 3 + 7 z a 5 + 4 z a 7 − 4 a 2 − 5 a 4 − 2 a 6 {\displaystyle {\frac {z^{7}}{a^{3}}}+{\frac {z^{7}}{a^{5}}}+{\frac {z^{6}}{a^{2}}}+{\frac {4z^{6}}{a^{4}}}+{\frac {3z^{6}}{a^{6}}}-{\frac {3z^{5}}{a^{3}}}+{\frac {z^{5}}{a^{5}}}+{\frac {4z^{5}}{a^{7}}}-{\frac {5z^{4}}{a^{2}}}-{\frac {15z^{4}}{a^{4}}}-{\frac {7z^{4}}{a^{6}}}+{\frac {3z^{4}}{a^{8}}}-{\frac {10z^{3}}{a^{5}}}-{\frac {8z^{3}}{a^{7}}}+{\frac {2z^{3}}{a^{9}}}+{\frac {8z^{2}}{a^{2}}}+{\frac {15z^{2}}{a^{4}}}+{\frac {4z^{2}}{a^{6}}}-{\frac {2z^{2}}{a^{8}}}+{\frac {z^{2}}{a^{10}}}+{\frac {3z}{a^{3}}}+{\frac {7z}{a^{5}}}+{\frac {4z}{a^{7}}}-{\frac {4}{a^{2}}}-{\frac {5}{a^{4}}}-{\frac {2}{a^{6}}}}
