− a 4 z 10 + a 6 z 8 − 8 a 4 z 8 + 2 a 2 z 8 + 6 a 6 z 6 − 26 a 4 z 6 + 13 a 2 z 6 − z 6 + 13 a 6 z 4 − 44 a 4 z 4 + 31 a 2 z 4 − 5 z 4 + 13 a 6 z 2 − 39 a 4 z 2 + 34 a 2 z 2 − 8 z 2 + 5 a 6 − 15 a 4 + 15 a 2 − 4 {\displaystyle -a^{4}z^{10}+a^{6}z^{8}-8a^{4}z^{8}+2a^{2}z^{8}+6a^{6}z^{6}-26a^{4}z^{6}+13a^{2}z^{6}-z^{6}+13a^{6}z^{4}-44a^{4}z^{4}+31a^{2}z^{4}-5z^{4}+13a^{6}z^{2}-39a^{4}z^{2}+34a^{2}z^{2}-8z^{2}+5a^{6}-15a^{4}+15a^{2}-4}
