a 6 z 10 + a 4 z 10 + 4 a 7 z 9 + 6 a 5 z 9 + 2 a 3 z 9 + 3 a 8 z 8 + 7 a 6 z 8 + 5 a 4 z 8 + a 2 z 8 − 12 a 7 z 7 − 13 a 5 z 7 − a 3 z 7 − 6 a 8 z 6 − 28 a 6 z 6 − 20 a 4 z 6 + 2 a 2 z 6 + 6 a 9 z 5 + 21 a 7 z 5 + 10 a 5 z 5 − a 3 z 5 + 4 a z 5 + 2 a 8 z 4 + 35 a 6 z 4 + 32 a 4 z 4 + z 4 − 16 a 9 z 3 − 28 a 7 z 3 − 2 a 5 z 3 + 6 a 3 z 3 − 4 a z 3 − a 8 z 2 − 16 a 6 z 2 − 17 a 4 z 2 − 3 a 2 z 2 − z 2 + 9 a 9 z + 12 a 7 z + 2 a 5 z − 2 a 3 z − a z − 2 a 8 − a 6 + 3 a 4 + a 2 {\displaystyle a^{6}z^{10}+a^{4}z^{10}+4a^{7}z^{9}+6a^{5}z^{9}+2a^{3}z^{9}+3a^{8}z^{8}+7a^{6}z^{8}+5a^{4}z^{8}+a^{2}z^{8}-12a^{7}z^{7}-13a^{5}z^{7}-a^{3}z^{7}-6a^{8}z^{6}-28a^{6}z^{6}-20a^{4}z^{6}+2a^{2}z^{6}+6a^{9}z^{5}+21a^{7}z^{5}+10a^{5}z^{5}-a^{3}z^{5}+4az^{5}+2a^{8}z^{4}+35a^{6}z^{4}+32a^{4}z^{4}+z^{4}-16a^{9}z^{3}-28a^{7}z^{3}-2a^{5}z^{3}+6a^{3}z^{3}-4az^{3}-a^{8}z^{2}-16a^{6}z^{2}-17a^{4}z^{2}-3a^{2}z^{2}-z^{2}+9a^{9}z+12a^{7}z+2a^{5}z-2a^{3}z-az-2a^{8}-a^{6}+3a^{4}+a^{2}}