z 2 a 14 + 2 a 14 − 4 z 4 a 12 − 11 z 2 a 12 − 7 a 12 + 5 z 6 a 10 + 18 z 4 a 10 + 21 z 2 a 10 + 9 a 10 − 2 z 8 a 8 − 9 z 6 a 8 − 17 z 4 a 8 − 18 z 2 a 8 − 8 a 8 + 3 z 6 a 6 + 11 z 4 a 6 + 13 z 2 a 6 + 5 a 6 {\displaystyle z^{2}a^{14}+2a^{14}-4z^{4}a^{12}-11z^{2}a^{12}-7a^{12}+5z^{6}a^{10}+18z^{4}a^{10}+21z^{2}a^{10}+9a^{10}-2z^{8}a^{8}-9z^{6}a^{8}-17z^{4}a^{8}-18z^{2}a^{8}-8a^{8}+3z^{6}a^{6}+11z^{4}a^{6}+13z^{2}a^{6}+5a^{6}}
