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 + 17 z 5 a 13 − 7 z 3 a 13 + 2 z a 13 + 9 z 10 a 12 − 13 z 8 a 12 − 5 z 6 a 12 + 11 z 4 a 12 − 3 z 2 a 12 + 6 z 11 a 11 + 7 z 9 a 11 − 41 z 7 a 11 + 36 z 5 a 11 − 10 z 3 a 11 − z a 11 + 2 z 12 a 10 + 19 z 10 a 10 − 41 z 8 a 10 + 12 z 6 a 10 + 14 z 4 a 10 − 12 z 2 a 10 + 3 a 10 + 14 z 11 a 9 − 7 z 9 a 9 − 32 z 7 a 9 + 31 z 5 a 9 − 4 z 3 a 9 − 3 z a 9 + 2 z 12 a 8 + 24 z 10 a 8 − 53 z 8 a 8 + 31 z 6 a 8 + 5 z 4 a 8 − 11 z 2 a 8 + 4 a 8 + 8 z 11 a 7 + 8 z 9 a 7 − 43 z 7 a 7 + 47 z 5 a 7 − 19 z 3 a 7 + 2 z a 7 + 14 z 10 a 6 − 20 z 8 a 6 + 8 z 6 a 6 + 5 z 4 a 6 − 5 z 2 a 6 + a 6 + 14 z 9 a 5 − 27 z 7 a 5 + 25 z 5 a 5 − 12 z 3 a 5 + z a 5 + 9 z 8 a 4 − 16 z 6 a 4 + 11 z 4 a 4 − 5 z 2 a 4 + 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}+17z^{5}a^{13}-7z^{3}a^{13}+2za^{13}+9z^{10}a^{12}-13z^{8}a^{12}-5z^{6}a^{12}+11z^{4}a^{12}-3z^{2}a^{12}+6z^{11}a^{11}+7z^{9}a^{11}-41z^{7}a^{11}+36z^{5}a^{11}-10z^{3}a^{11}-za^{11}+2z^{12}a^{10}+19z^{10}a^{10}-41z^{8}a^{10}+12z^{6}a^{10}+14z^{4}a^{10}-12z^{2}a^{10}+3a^{10}+14z^{11}a^{9}-7z^{9}a^{9}-32z^{7}a^{9}+31z^{5}a^{9}-4z^{3}a^{9}-3za^{9}+2z^{12}a^{8}+24z^{10}a^{8}-53z^{8}a^{8}+31z^{6}a^{8}+5z^{4}a^{8}-11z^{2}a^{8}+4a^{8}+8z^{11}a^{7}+8z^{9}a^{7}-43z^{7}a^{7}+47z^{5}a^{7}-19z^{3}a^{7}+2za^{7}+14z^{10}a^{6}-20z^{8}a^{6}+8z^{6}a^{6}+5z^{4}a^{6}-5z^{2}a^{6}+a^{6}+14z^{9}a^{5}-27z^{7}a^{5}+25z^{5}a^{5}-12z^{3}a^{5}+za^{5}+9z^{8}a^{4}-16z^{6}a^{4}+11z^{4}a^{4}-5z^{2}a^{4}+a^{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}}
