a 6 z 10 − a 8 z 8 + 8 a 6 z 8 − a 4 z 8 − 6 a 8 z 6 + 23 a 6 z 6 − 6 a 4 z 6 − 11 a 8 z 4 + 28 a 6 z 4 − 10 a 4 z 4 − 6 a 8 z 2 + 11 a 6 z 2 − 2 a 4 z 2 − 2 a 6 + 3 a 4 {\displaystyle a^{6}z^{10}-a^{8}z^{8}+8a^{6}z^{8}-a^{4}z^{8}-6a^{8}z^{6}+23a^{6}z^{6}-6a^{4}z^{6}-11a^{8}z^{4}+28a^{6}z^{4}-10a^{4}z^{4}-6a^{8}z^{2}+11a^{6}z^{2}-2a^{4}z^{2}-2a^{6}+3a^{4}}
