z 4 a 10 + 2 z 2 a 10 + a 10 − z 6 a 8 − 5 z 4 a 8 − 9 z 2 a 8 − 5 a 8 + z 6 a 6 + 7 z 4 a 6 + 12 z 2 a 6 + 5 a 6 {\displaystyle z^{4}a^{10}+2z^{2}a^{10}+a^{10}-z^{6}a^{8}-5z^{4}a^{8}-9z^{2}a^{8}-5a^{8}+z^{6}a^{6}+7z^{4}a^{6}+12z^{2}a^{6}+5a^{6}}
