− a 4 z 10 + 2 a 6 z 8 − 6 a 4 z 8 + a 2 z 8 − a 8 z 6 + 9 a 6 z 6 − 14 a 4 z 6 + 4 a 2 z 6 − 3 a 8 z 4 + 13 a 6 z 4 − 15 a 4 z 4 + 5 a 2 z 4 − 2 a 8 z 2 + 6 a 6 z 2 − 5 a 4 z 2 + 3 a 2 z 2 − a 6 + a 4 + a 2 {\displaystyle -a^{4}z^{10}+2a^{6}z^{8}-6a^{4}z^{8}+a^{2}z^{8}-a^{8}z^{6}+9a^{6}z^{6}-14a^{4}z^{6}+4a^{2}z^{6}-3a^{8}z^{4}+13a^{6}z^{4}-15a^{4}z^{4}+5a^{2}z^{4}-2a^{8}z^{2}+6a^{6}z^{2}-5a^{4}z^{2}+3a^{2}z^{2}-a^{6}+a^{4}+a^{2}}
