z 5 a 13 − 3 z 3 a 13 + 2 z a 13 + 2 z 6 a 12 − 4 z 4 a 12 + z 2 a 12 + 3 z 7 a 11 − 6 z 5 a 11 + 4 z 3 a 11 − 2 z a 11 + 3 z 8 a 10 − 7 z 6 a 10 + 11 z 4 a 10 − 10 z 2 a 10 + 2 a 10 + z 9 a 9 + 3 z 7 a 9 − 10 z 5 a 9 + 12 z 3 a 9 − 4 z a 9 + 5 z 8 a 8 − 13 z 6 a 8 + 20 z 4 a 8 − 13 z 2 a 8 + 3 a 8 + z 9 a 7 + z 7 a 7 − 2 z 5 a 7 + 2 z 3 a 7 + 2 z 8 a 6 − 4 z 6 a 6 + 8 z 4 a 6 − 8 z 2 a 6 + 2 a 6 + z 7 a 5 + z 5 a 5 − 3 z 3 a 5 + 3 z 4 a 4 − 6 z 2 a 4 + 2 a 4 {\displaystyle z^{5}a^{13}-3z^{3}a^{13}+2za^{13}+2z^{6}a^{12}-4z^{4}a^{12}+z^{2}a^{12}+3z^{7}a^{11}-6z^{5}a^{11}+4z^{3}a^{11}-2za^{11}+3z^{8}a^{10}-7z^{6}a^{10}+11z^{4}a^{10}-10z^{2}a^{10}+2a^{10}+z^{9}a^{9}+3z^{7}a^{9}-10z^{5}a^{9}+12z^{3}a^{9}-4za^{9}+5z^{8}a^{8}-13z^{6}a^{8}+20z^{4}a^{8}-13z^{2}a^{8}+3a^{8}+z^{9}a^{7}+z^{7}a^{7}-2z^{5}a^{7}+2z^{3}a^{7}+2z^{8}a^{6}-4z^{6}a^{6}+8z^{4}a^{6}-8z^{2}a^{6}+2a^{6}+z^{7}a^{5}+z^{5}a^{5}-3z^{3}a^{5}+3z^{4}a^{4}-6z^{2}a^{4}+2a^{4}}
