a 4 z 10 + a 2 z 10 + 3 a 5 z 9 + 5 a 3 z 9 + 2 a z 9 + 2 a 6 z 8 + 2 a 4 z 8 + a 2 z 8 + z 8 − 11 a 5 z 7 − 15 a 3 z 7 − 4 a z 7 − 5 a 6 z 6 − 9 a 4 z 6 − 2 a 2 z 6 + 2 z 6 + 4 a 7 z 5 + 24 a 5 z 5 + 25 a 3 z 5 + 8 a z 5 + 3 z 5 a − 1 + a 8 z 4 + 10 a 6 z 4 + 11 a 4 z 4 − 8 a 2 z 4 − 10 z 4 − 6 a 7 z 3 − 19 a 5 z 3 − 23 a 3 z 3 − 17 a z 3 − 7 z 3 a − 1 − 2 a 8 z 2 − 5 a 6 z 2 + 5 a 4 z 2 + 15 a 2 z 2 + 7 z 2 + a 7 z + 7 a 5 z + 11 a 3 z + 8 a z + 3 z a − 1 − a 6 − 6 a 4 − 9 a 2 − 3 {\displaystyle a^{4}z^{10}+a^{2}z^{10}+3a^{5}z^{9}+5a^{3}z^{9}+2az^{9}+2a^{6}z^{8}+2a^{4}z^{8}+a^{2}z^{8}+z^{8}-11a^{5}z^{7}-15a^{3}z^{7}-4az^{7}-5a^{6}z^{6}-9a^{4}z^{6}-2a^{2}z^{6}+2z^{6}+4a^{7}z^{5}+24a^{5}z^{5}+25a^{3}z^{5}+8az^{5}+3z^{5}a^{-1}+a^{8}z^{4}+10a^{6}z^{4}+11a^{4}z^{4}-8a^{2}z^{4}-10z^{4}-6a^{7}z^{3}-19a^{5}z^{3}-23a^{3}z^{3}-17az^{3}-7z^{3}a^{-1}-2a^{8}z^{2}-5a^{6}z^{2}+5a^{4}z^{2}+15a^{2}z^{2}+7z^{2}+a^{7}z+7a^{5}z+11a^{3}z+8az+3za^{-1}-a^{6}-6a^{4}-9a^{2}-3}