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 − 6 z 4 a 12 + 4 z 2 a 12 + 4 z 7 a 11 − 7 z 5 a 11 + 2 z 3 a 11 + 4 z 8 a 10 − 11 z 6 a 10 + 10 z 4 a 10 − 9 z 2 a 10 + 3 a 10 + 3 z 9 a 9 − 9 z 7 a 9 + 6 z 5 a 9 − 3 z 3 a 9 + z 10 a 8 + 2 z 8 a 8 − 24 z 6 a 8 + 41 z 4 a 8 − 27 z 2 a 8 + 6 a 8 + 5 z 9 a 7 − 24 z 7 a 7 + 34 z 5 a 7 − 17 z 3 a 7 + 3 z a 7 + z 10 a 6 − z 8 a 6 − 15 z 6 a 6 + 35 z 4 a 6 − 23 z 2 a 6 + 5 a 6 + 2 z 9 a 5 − 11 z 7 a 5 + 18 z 5 a 5 − 9 z 3 a 5 + z a 5 + z 8 a 4 − 6 z 6 a 4 + 12 z 4 a 4 − 10 z 2 a 4 + 3 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}-6z^{4}a^{12}+4z^{2}a^{12}+4z^{7}a^{11}-7z^{5}a^{11}+2z^{3}a^{11}+4z^{8}a^{10}-11z^{6}a^{10}+10z^{4}a^{10}-9z^{2}a^{10}+3a^{10}+3z^{9}a^{9}-9z^{7}a^{9}+6z^{5}a^{9}-3z^{3}a^{9}+z^{10}a^{8}+2z^{8}a^{8}-24z^{6}a^{8}+41z^{4}a^{8}-27z^{2}a^{8}+6a^{8}+5z^{9}a^{7}-24z^{7}a^{7}+34z^{5}a^{7}-17z^{3}a^{7}+3za^{7}+z^{10}a^{6}-z^{8}a^{6}-15z^{6}a^{6}+35z^{4}a^{6}-23z^{2}a^{6}+5a^{6}+2z^{9}a^{5}-11z^{7}a^{5}+18z^{5}a^{5}-9z^{3}a^{5}+za^{5}+z^{8}a^{4}-6z^{6}a^{4}+12z^{4}a^{4}-10z^{2}a^{4}+3a^{4}}
