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