− 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 + 12 a 2 z 6 − z 6 + 13 a 6 z 4 − 42 a 4 z 4 + 25 a 2 z 4 − 4 z 4 + 12 a 6 z 2 − 31 a 4 z 2 + 22 a 2 z 2 − 4 z 2 + 3 a 6 − 8 a 4 + 7 a 2 − 1 {\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}+12a^{2}z^{6}-z^{6}+13a^{6}z^{4}-42a^{4}z^{4}+25a^{2}z^{4}-4z^{4}+12a^{6}z^{2}-31a^{4}z^{2}+22a^{2}z^{2}-4z^{2}+3a^{6}-8a^{4}+7a^{2}-1}
