z 7 a 11 − 3 z 5 a 11 + 3 z 3 a 11 − z a 11 + 4 z 8 a 10 − 11 z 6 a 10 + 10 z 4 a 10 − 4 z 2 a 10 + a 10 + 8 z 9 a 9 − 21 z 7 a 9 + 18 z 5 a 9 − 9 z 3 a 9 + 3 z a 9 + 8 z 10 a 8 − 11 z 8 a 8 − 12 z 6 a 8 + 22 z 4 a 8 − 11 z 2 a 8 + 2 a 8 + 3 z 11 a 7 + 19 z 9 a 7 − 72 z 7 a 7 + 77 z 5 a 7 − 37 z 3 a 7 + 7 z a 7 + 20 z 10 a 6 − 32 z 8 a 6 − 14 z 6 a 6 + 40 z 4 a 6 − 18 z 2 a 6 + 2 a 6 + 3 z 11 a 5 + 31 z 9 a 5 − 92 z 7 a 5 + 83 z 5 a 5 − 30 z 3 a 5 + 4 z a 5 + 12 z 10 a 4 + 2 z 8 a 4 − 45 z 6 a 4 + 43 z 4 a 4 − 12 z 2 a 4 + a 4 + 20 z 9 a 3 − 30 z 7 a 3 + 14 z 5 a 3 − 3 z 3 a 3 + z a 3 + 19 z 8 a 2 − 27 z 6 a 2 + 12 z 4 a 2 − z 2 a 2 − a 2 + 12 z 7 a − 12 z 5 a + 2 z 3 a + 5 z 6 − 3 z 4 + z 5 a − 1 {\displaystyle z^{7}a^{11}-3z^{5}a^{11}+3z^{3}a^{11}-za^{11}+4z^{8}a^{10}-11z^{6}a^{10}+10z^{4}a^{10}-4z^{2}a^{10}+a^{10}+8z^{9}a^{9}-21z^{7}a^{9}+18z^{5}a^{9}-9z^{3}a^{9}+3za^{9}+8z^{10}a^{8}-11z^{8}a^{8}-12z^{6}a^{8}+22z^{4}a^{8}-11z^{2}a^{8}+2a^{8}+3z^{11}a^{7}+19z^{9}a^{7}-72z^{7}a^{7}+77z^{5}a^{7}-37z^{3}a^{7}+7za^{7}+20z^{10}a^{6}-32z^{8}a^{6}-14z^{6}a^{6}+40z^{4}a^{6}-18z^{2}a^{6}+2a^{6}+3z^{11}a^{5}+31z^{9}a^{5}-92z^{7}a^{5}+83z^{5}a^{5}-30z^{3}a^{5}+4za^{5}+12z^{10}a^{4}+2z^{8}a^{4}-45z^{6}a^{4}+43z^{4}a^{4}-12z^{2}a^{4}+a^{4}+20z^{9}a^{3}-30z^{7}a^{3}+14z^{5}a^{3}-3z^{3}a^{3}+za^{3}+19z^{8}a^{2}-27z^{6}a^{2}+12z^{4}a^{2}-z^{2}a^{2}-a^{2}+12z^{7}a-12z^{5}a+2z^{3}a+5z^{6}-3z^{4}+z^{5}a^{-1}}
