− a 4 z 10 + a 6 z 8 − 8 a 4 z 8 + a 2 z 8 + 6 a 6 z 6 − 25 a 4 z 6 + 5 a 2 z 6 + 13 a 6 z 4 − 37 a 4 z 4 + 8 a 2 z 4 + z 4 + 12 a 6 z 2 − 24 a 4 z 2 + 5 a 2 z 2 + 3 z 2 + 3 a 6 − 5 a 4 + a 2 + 2 {\displaystyle -a^{4}z^{10}+a^{6}z^{8}-8a^{4}z^{8}+a^{2}z^{8}+6a^{6}z^{6}-25a^{4}z^{6}+5a^{2}z^{6}+13a^{6}z^{4}-37a^{4}z^{4}+8a^{2}z^{4}+z^{4}+12a^{6}z^{2}-24a^{4}z^{2}+5a^{2}z^{2}+3z^{2}+3a^{6}-5a^{4}+a^{2}+2}
