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 + 15 a 2 z 6 − 5 z 6 − 10 a 6 z 4 + 18 a 4 z 4 + 18 a 2 z 4 − 10 z 4 − 8 a 6 z 2 + 10 a 4 z 2 + 10 a 2 z 2 − 8 z 2 − 2 a 6 + 2 a 4 + 2 a 2 − 1 {\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}+15a^{2}z^{6}-5z^{6}-10a^{6}z^{4}+18a^{4}z^{4}+18a^{2}z^{4}-10z^{4}-8a^{6}z^{2}+10a^{4}z^{2}+10a^{2}z^{2}-8z^{2}-2a^{6}+2a^{4}+2a^{2}-1}
