a 4 z 10 + a 2 z 10 − a 6 z 8 + 6 a 4 z 8 + 5 a 2 z 8 − z 8 − 5 a 6 z 6 + 16 a 4 z 6 + 8 a 2 z 6 − 4 z 6 − 10 a 6 z 4 + 25 a 4 z 4 + 2 a 2 z 4 − 5 z 4 − 10 a 6 z 2 + 23 a 4 z 2 − 5 a 2 z 2 − 2 z 2 − 5 a 6 + 9 a 4 − 3 a 2 {\displaystyle a^{4}z^{10}+a^{2}z^{10}-a^{6}z^{8}+6a^{4}z^{8}+5a^{2}z^{8}-z^{8}-5a^{6}z^{6}+16a^{4}z^{6}+8a^{2}z^{6}-4z^{6}-10a^{6}z^{4}+25a^{4}z^{4}+2a^{2}z^{4}-5z^{4}-10a^{6}z^{2}+23a^{4}z^{2}-5a^{2}z^{2}-2z^{2}-5a^{6}+9a^{4}-3a^{2}}