− a 4 z 10 + 2 a 6 z 8 − 8 a 4 z 8 + a 2 z 8 − a 8 z 6 + 14 a 6 z 6 − 25 a 4 z 6 + 6 a 2 z 6 − 6 a 8 z 4 + 35 a 6 z 4 − 38 a 4 z 4 + 12 a 2 z 4 − 11 a 8 z 2 + 36 a 6 z 2 − 27 a 4 z 2 + 9 a 2 z 2 − 6 a 8 + 12 a 6 − 7 a 4 + 2 a 2 {\displaystyle -a^{4}z^{10}+2a^{6}z^{8}-8a^{4}z^{8}+a^{2}z^{8}-a^{8}z^{6}+14a^{6}z^{6}-25a^{4}z^{6}+6a^{2}z^{6}-6a^{8}z^{4}+35a^{6}z^{4}-38a^{4}z^{4}+12a^{2}z^{4}-11a^{8}z^{2}+36a^{6}z^{2}-27a^{4}z^{2}+9a^{2}z^{2}-6a^{8}+12a^{6}-7a^{4}+2a^{2}}
