a 6 z 10 − a 8 z 8 + 8 a 6 z 8 − 2 a 4 z 8 − 6 a 8 z 6 + 25 a 6 z 6 − 13 a 4 z 6 + a 2 z 6 − 12 a 8 z 4 + 39 a 6 z 4 − 28 a 4 z 4 + 5 a 2 z 4 − 10 a 8 z 2 + 30 a 6 z 2 − 22 a 4 z 2 + 7 a 2 z 2 − 4 a 8 + 8 a 6 − 5 a 4 + 2 a 2 {\displaystyle a^{6}z^{10}-a^{8}z^{8}+8a^{6}z^{8}-2a^{4}z^{8}-6a^{8}z^{6}+25a^{6}z^{6}-13a^{4}z^{6}+a^{2}z^{6}-12a^{8}z^{4}+39a^{6}z^{4}-28a^{4}z^{4}+5a^{2}z^{4}-10a^{8}z^{2}+30a^{6}z^{2}-22a^{4}z^{2}+7a^{2}z^{2}-4a^{8}+8a^{6}-5a^{4}+2a^{2}}
