z 4 a 12 − z 2 a 12 + 3 z 5 a 11 − 5 z 3 a 11 + 2 z a 11 + 3 z 6 a 10 − 3 z 4 a 10 − a 10 + z 7 a 9 + 6 z 5 a 9 − 14 z 3 a 9 + 8 z a 9 + 6 z 6 a 8 − 10 z 4 a 8 + 8 z 2 a 8 − 4 a 8 + z 7 a 7 + 5 z 5 a 7 − 11 z 3 a 7 + 6 z a 7 + 3 z 6 a 6 − 5 z 4 a 6 + 5 z 2 a 6 − 3 a 6 + 2 z 5 a 5 − 2 z 3 a 5 + z 4 a 4 − 2 z 2 a 4 + a 4 {\displaystyle z^{4}a^{12}-z^{2}a^{12}+3z^{5}a^{11}-5z^{3}a^{11}+2za^{11}+3z^{6}a^{10}-3z^{4}a^{10}-a^{10}+z^{7}a^{9}+6z^{5}a^{9}-14z^{3}a^{9}+8za^{9}+6z^{6}a^{8}-10z^{4}a^{8}+8z^{2}a^{8}-4a^{8}+z^{7}a^{7}+5z^{5}a^{7}-11z^{3}a^{7}+6za^{7}+3z^{6}a^{6}-5z^{4}a^{6}+5z^{2}a^{6}-3a^{6}+2z^{5}a^{5}-2z^{3}a^{5}+z^{4}a^{4}-2z^{2}a^{4}+a^{4}}
