a 6 z 10 + a 4 z 10 + 2 a 7 z 9 + 4 a 5 z 9 + 2 a 3 z 9 + a 8 z 8 − 3 a 6 z 8 − 3 a 4 z 8 + a 2 z 8 − 12 a 7 z 7 − 23 a 5 z 7 − 11 a 3 z 7 − 6 a 8 z 6 − 6 a 6 z 6 − 4 a 4 z 6 − 4 a 2 z 6 + 22 a 7 z 5 + 40 a 5 z 5 + 20 a 3 z 5 + 2 a z 5 + 11 a 8 z 4 + 20 a 6 z 4 + 13 a 4 z 4 + 5 a 2 z 4 + z 4 − 15 a 7 z 3 − 27 a 5 z 3 − 18 a 3 z 3 − 5 a z 3 + z 3 a − 1 − 7 a 8 z 2 − 12 a 6 z 2 − 9 a 4 z 2 − 5 a 2 z 2 + z 2 a − 2 + 4 a 7 z + 7 a 5 z + 5 a 3 z + 2 a z + a 8 + 2 a 6 + 2 a 4 + a 2 − a − 2 {\displaystyle a^{6}z^{10}+a^{4}z^{10}+2a^{7}z^{9}+4a^{5}z^{9}+2a^{3}z^{9}+a^{8}z^{8}-3a^{6}z^{8}-3a^{4}z^{8}+a^{2}z^{8}-12a^{7}z^{7}-23a^{5}z^{7}-11a^{3}z^{7}-6a^{8}z^{6}-6a^{6}z^{6}-4a^{4}z^{6}-4a^{2}z^{6}+22a^{7}z^{5}+40a^{5}z^{5}+20a^{3}z^{5}+2az^{5}+11a^{8}z^{4}+20a^{6}z^{4}+13a^{4}z^{4}+5a^{2}z^{4}+z^{4}-15a^{7}z^{3}-27a^{5}z^{3}-18a^{3}z^{3}-5az^{3}+z^{3}a^{-1}-7a^{8}z^{2}-12a^{6}z^{2}-9a^{4}z^{2}-5a^{2}z^{2}+z^{2}a^{-2}+4a^{7}z+7a^{5}z+5a^{3}z+2az+a^{8}+2a^{6}+2a^{4}+a^{2}-a^{-2}}
