2 a 6 z 10 + 2 a 4 z 10 + 3 a 7 z 9 + 8 a 5 z 9 + 5 a 3 z 9 + a 8 z 8 − 6 a 6 z 8 − a 4 z 8 + 6 a 2 z 8 − 16 a 7 z 7 − 36 a 5 z 7 − 16 a 3 z 7 + 4 a z 7 − 5 a 8 z 6 − 3 a 6 z 6 − 19 a 4 z 6 − 20 a 2 z 6 + z 6 + 27 a 7 z 5 + 46 a 5 z 5 + 9 a 3 z 5 − 10 a z 5 + 8 a 8 z 4 + 15 a 6 z 4 + 23 a 4 z 4 + 18 a 2 z 4 + 2 z 4 − 15 a 7 z 3 − 19 a 5 z 3 + 7 a z 3 + 3 z 3 a − 1 − 4 a 8 z 2 − 6 a 6 z 2 − 5 a 4 z 2 − 7 a 2 z 2 + z 2 a − 2 − 3 z 2 + a 7 z + 2 a 5 z − 2 a z − z a − 1 + 1 {\displaystyle 2a^{6}z^{10}+2a^{4}z^{10}+3a^{7}z^{9}+8a^{5}z^{9}+5a^{3}z^{9}+a^{8}z^{8}-6a^{6}z^{8}-a^{4}z^{8}+6a^{2}z^{8}-16a^{7}z^{7}-36a^{5}z^{7}-16a^{3}z^{7}+4az^{7}-5a^{8}z^{6}-3a^{6}z^{6}-19a^{4}z^{6}-20a^{2}z^{6}+z^{6}+27a^{7}z^{5}+46a^{5}z^{5}+9a^{3}z^{5}-10az^{5}+8a^{8}z^{4}+15a^{6}z^{4}+23a^{4}z^{4}+18a^{2}z^{4}+2z^{4}-15a^{7}z^{3}-19a^{5}z^{3}+7az^{3}+3z^{3}a^{-1}-4a^{8}z^{2}-6a^{6}z^{2}-5a^{4}z^{2}-7a^{2}z^{2}+z^{2}a^{-2}-3z^{2}+a^{7}z+2a^{5}z-2az-za^{-1}+1}
