z 3 a 15 − z a 15 + 2 z 4 a 14 − z 2 a 14 + 3 z 5 a 13 − 2 z 3 a 13 + z a 13 + 4 z 6 a 12 − 5 z 4 a 12 + 2 z 2 a 12 + 5 z 7 a 11 − 11 z 5 a 11 + 7 z 3 a 11 − 2 z a 11 + 5 z 8 a 10 − 15 z 6 a 10 + 15 z 4 a 10 − 11 z 2 a 10 + 3 a 10 + 3 z 9 a 9 − 6 z 7 a 9 − 6 z 5 a 9 + 10 z 3 a 9 − 3 z a 9 + z 10 a 8 + 3 z 8 a 8 − 26 z 6 a 8 + 38 z 4 a 8 − 21 z 2 a 8 + 5 a 8 + 5 z 9 a 7 − 22 z 7 a 7 + 27 z 5 a 7 − 11 z 3 a 7 + 2 z a 7 + z 10 a 6 − z 8 a 6 − 13 z 6 a 6 + 28 z 4 a 6 − 16 z 2 a 6 + 3 a 6 + 2 z 9 a 5 − 11 z 7 a 5 + 19 z 5 a 5 − 11 z 3 a 5 + z a 5 + z 8 a 4 − 6 z 6 a 4 + 12 z 4 a 4 − 9 z 2 a 4 + 2 a 4 {\displaystyle z^{3}a^{15}-za^{15}+2z^{4}a^{14}-z^{2}a^{14}+3z^{5}a^{13}-2z^{3}a^{13}+za^{13}+4z^{6}a^{12}-5z^{4}a^{12}+2z^{2}a^{12}+5z^{7}a^{11}-11z^{5}a^{11}+7z^{3}a^{11}-2za^{11}+5z^{8}a^{10}-15z^{6}a^{10}+15z^{4}a^{10}-11z^{2}a^{10}+3a^{10}+3z^{9}a^{9}-6z^{7}a^{9}-6z^{5}a^{9}+10z^{3}a^{9}-3za^{9}+z^{10}a^{8}+3z^{8}a^{8}-26z^{6}a^{8}+38z^{4}a^{8}-21z^{2}a^{8}+5a^{8}+5z^{9}a^{7}-22z^{7}a^{7}+27z^{5}a^{7}-11z^{3}a^{7}+2za^{7}+z^{10}a^{6}-z^{8}a^{6}-13z^{6}a^{6}+28z^{4}a^{6}-16z^{2}a^{6}+3a^{6}+2z^{9}a^{5}-11z^{7}a^{5}+19z^{5}a^{5}-11z^{3}a^{5}+za^{5}+z^{8}a^{4}-6z^{6}a^{4}+12z^{4}a^{4}-9z^{2}a^{4}+2a^{4}}
