z 2 a 14 + 2 a 14 − 4 z 4 a 12 − 12 z 2 a 12 − 7 a 12 + 5 z 6 a 10 + 20 z 4 a 10 + 23 z 2 a 10 + 8 a 10 − 2 z 8 a 8 − 10 z 6 a 8 − 19 z 4 a 8 − 18 z 2 a 8 − 6 a 8 + 3 z 6 a 6 + 12 z 4 a 6 + 13 z 2 a 6 + 4 a 6 {\displaystyle z^{2}a^{14}+2a^{14}-4z^{4}a^{12}-12z^{2}a^{12}-7a^{12}+5z^{6}a^{10}+20z^{4}a^{10}+23z^{2}a^{10}+8a^{10}-2z^{8}a^{8}-10z^{6}a^{8}-19z^{4}a^{8}-18z^{2}a^{8}-6a^{8}+3z^{6}a^{6}+12z^{4}a^{6}+13z^{2}a^{6}+4a^{6}}
