z 7 a 11 − 6 z 5 a 11 + 12 z 3 a 11 − 8 z a 11 + z 8 a 10 − 4 z 6 a 10 + 3 z 4 a 10 + z 2 a 10 + a 10 + 4 z 7 a 9 − 18 z 5 a 9 + 23 z 3 a 9 − 9 z a 9 + z 8 a 8 + z 6 a 8 − 15 z 4 a 8 + 16 z 2 a 8 − a 8 + 3 z 7 a 7 − 8 z 5 a 7 + 3 z 3 a 7 − z a 7 + 5 z 6 a 6 − 15 z 4 a 6 + 12 z 2 a 6 − 3 a 6 + 4 z 5 a 5 − 6 z 3 a 5 + 3 z 4 a 4 − 2 z 2 a 4 + 2 z 3 a 3 + z 2 a 2 {\displaystyle z^{7}a^{11}-6z^{5}a^{11}+12z^{3}a^{11}-8za^{11}+z^{8}a^{10}-4z^{6}a^{10}+3z^{4}a^{10}+z^{2}a^{10}+a^{10}+4z^{7}a^{9}-18z^{5}a^{9}+23z^{3}a^{9}-9za^{9}+z^{8}a^{8}+z^{6}a^{8}-15z^{4}a^{8}+16z^{2}a^{8}-a^{8}+3z^{7}a^{7}-8z^{5}a^{7}+3z^{3}a^{7}-za^{7}+5z^{6}a^{6}-15z^{4}a^{6}+12z^{2}a^{6}-3a^{6}+4z^{5}a^{5}-6z^{3}a^{5}+3z^{4}a^{4}-2z^{2}a^{4}+2z^{3}a^{3}+z^{2}a^{2}}
