a 2 z 10 − 2 a 4 z 8 + 6 a 2 z 8 − z 8 + a 6 z 6 − 10 a 4 z 6 + 14 a 2 z 6 − 4 z 6 + 4 a 6 z 4 − 18 a 4 z 4 + 16 a 2 z 4 − 5 z 4 + 5 a 6 z 2 − 14 a 4 z 2 + 10 a 2 z 2 − 2 z 2 + 2 a 6 − 5 a 4 + 4 a 2 {\displaystyle a^{2}z^{10}-2a^{4}z^{8}+6a^{2}z^{8}-z^{8}+a^{6}z^{6}-10a^{4}z^{6}+14a^{2}z^{6}-4z^{6}+4a^{6}z^{4}-18a^{4}z^{4}+16a^{2}z^{4}-5z^{4}+5a^{6}z^{2}-14a^{4}z^{2}+10a^{2}z^{2}-2z^{2}+2a^{6}-5a^{4}+4a^{2}}