a 9 z 5 − 4 a 9 z 3 + 3 a 9 z + a 8 z 6 − 4 a 8 z 4 + 4 a 8 z 2 − a 8 + 2 a 7 z 5 − 6 a 7 z 3 + 3 a 7 z + a 6 z 6 − 3 a 6 z 4 + 3 a 6 z 2 − a 6 + a 5 z 5 − a 5 z 3 + a 4 z 4 + a 3 z 3 + a 2 z 2 − a 2 {\displaystyle a^{9}z^{5}-4a^{9}z^{3}+3a^{9}z+a^{8}z^{6}-4a^{8}z^{4}+4a^{8}z^{2}-a^{8}+2a^{7}z^{5}-6a^{7}z^{3}+3a^{7}z+a^{6}z^{6}-3a^{6}z^{4}+3a^{6}z^{2}-a^{6}+a^{5}z^{5}-a^{5}z^{3}+a^{4}z^{4}+a^{3}z^{3}+a^{2}z^{2}-a^{2}}
