z 7 a 15 − 3 z 5 a 15 + 3 z 3 a 15 − z a 15 + 4 z 8 a 14 − 11 z 6 a 14 + 10 z 4 a 14 − 3 z 2 a 14 + 8 z 9 a 13 − 20 z 7 a 13 + 16 z 5 a 13 − 5 z 3 a 13 + z a 13 + 9 z 10 a 12 − 14 z 8 a 12 − 3 z 6 a 12 + 9 z 4 a 12 − 2 z 2 a 12 + 6 z 11 a 11 + 4 z 9 a 11 − 30 z 7 a 11 + 20 z 5 a 11 − z 3 a 11 − 2 z a 11 + 2 z 12 a 10 + 16 z 10 a 10 − 31 z 8 a 10 + 19 z 4 a 10 − 12 z 2 a 10 + 3 a 10 + 13 z 11 a 9 − 9 z 9 a 9 − 16 z 7 a 9 + 7 z 5 a 9 + 7 z 3 a 9 − 3 z a 9 + 2 z 12 a 8 + 19 z 10 a 8 − 34 z 8 a 8 + 2 z 6 a 8 + 27 z 4 a 8 − 19 z 2 a 8 + 5 a 8 + 7 z 11 a 7 + 8 z 9 a 7 − 35 z 7 a 7 + 33 z 5 a 7 − 12 z 3 a 7 + 2 z a 7 + 12 z 10 a 6 − 12 z 8 a 6 − 8 z 6 a 6 + 22 z 4 a 6 − 14 z 2 a 6 + 3 a 6 + 13 z 9 a 5 − 24 z 7 a 5 + 20 z 5 a 5 − 9 z 3 a 5 + z a 5 + 9 z 8 a 4 − 17 z 6 a 4 + 13 z 4 a 4 − 7 z 2 a 4 + 2 a 4 + 4 z 7 a 3 − 7 z 5 a 3 + 3 z 3 a 3 + z 6 a 2 − 2 z 4 a 2 + z 2 a 2 {\displaystyle z^{7}a^{15}-3z^{5}a^{15}+3z^{3}a^{15}-za^{15}+4z^{8}a^{14}-11z^{6}a^{14}+10z^{4}a^{14}-3z^{2}a^{14}+8z^{9}a^{13}-20z^{7}a^{13}+16z^{5}a^{13}-5z^{3}a^{13}+za^{13}+9z^{10}a^{12}-14z^{8}a^{12}-3z^{6}a^{12}+9z^{4}a^{12}-2z^{2}a^{12}+6z^{11}a^{11}+4z^{9}a^{11}-30z^{7}a^{11}+20z^{5}a^{11}-z^{3}a^{11}-2za^{11}+2z^{12}a^{10}+16z^{10}a^{10}-31z^{8}a^{10}+19z^{4}a^{10}-12z^{2}a^{10}+3a^{10}+13z^{11}a^{9}-9z^{9}a^{9}-16z^{7}a^{9}+7z^{5}a^{9}+7z^{3}a^{9}-3za^{9}+2z^{12}a^{8}+19z^{10}a^{8}-34z^{8}a^{8}+2z^{6}a^{8}+27z^{4}a^{8}-19z^{2}a^{8}+5a^{8}+7z^{11}a^{7}+8z^{9}a^{7}-35z^{7}a^{7}+33z^{5}a^{7}-12z^{3}a^{7}+2za^{7}+12z^{10}a^{6}-12z^{8}a^{6}-8z^{6}a^{6}+22z^{4}a^{6}-14z^{2}a^{6}+3a^{6}+13z^{9}a^{5}-24z^{7}a^{5}+20z^{5}a^{5}-9z^{3}a^{5}+za^{5}+9z^{8}a^{4}-17z^{6}a^{4}+13z^{4}a^{4}-7z^{2}a^{4}+2a^{4}+4z^{7}a^{3}-7z^{5}a^{3}+3z^{3}a^{3}+z^{6}a^{2}-2z^{4}a^{2}+z^{2}a^{2}}
