a 4 z 10 + a 2 z 10 − a 6 z 8 + 6 a 4 z 8 + 6 a 2 z 8 − z 8 − 5 a 6 z 6 + 15 a 4 z 6 + 14 a 2 z 6 − 5 z 6 − 10 a 6 z 4 + 21 a 4 z 4 + 14 a 2 z 4 − 9 z 4 − 10 a 6 z 2 + 18 a 4 z 2 + 3 a 2 z 2 − 6 z 2 − 4 a 6 + 7 a 4 − 2 a 2 {\displaystyle a^{4}z^{10}+a^{2}z^{10}-a^{6}z^{8}+6a^{4}z^{8}+6a^{2}z^{8}-z^{8}-5a^{6}z^{6}+15a^{4}z^{6}+14a^{2}z^{6}-5z^{6}-10a^{6}z^{4}+21a^{4}z^{4}+14a^{2}z^{4}-9z^{4}-10a^{6}z^{2}+18a^{4}z^{2}+3a^{2}z^{2}-6z^{2}-4a^{6}+7a^{4}-2a^{2}}
