− a 4 z 10 + 2 a 6 z 8 − 8 a 4 z 8 + a 2 z 8 − a 8 z 6 + 13 a 6 z 6 − 25 a 4 z 6 + 6 a 2 z 6 − 5 a 8 z 4 + 29 a 6 z 4 − 39 a 4 z 4 + 12 a 2 z 4 − 7 a 8 z 2 + 27 a 6 z 2 − 29 a 4 z 2 + 11 a 2 z 2 − 3 a 8 + 8 a 6 − 8 a 4 + 4 a 2 {\displaystyle -a^{4}z^{10}+2a^{6}z^{8}-8a^{4}z^{8}+a^{2}z^{8}-a^{8}z^{6}+13a^{6}z^{6}-25a^{4}z^{6}+6a^{2}z^{6}-5a^{8}z^{4}+29a^{6}z^{4}-39a^{4}z^{4}+12a^{2}z^{4}-7a^{8}z^{2}+27a^{6}z^{2}-29a^{4}z^{2}+11a^{2}z^{2}-3a^{8}+8a^{6}-8a^{4}+4a^{2}}
