z 2 a 14 + a 14 − 5 z 4 a 12 − 11 z 2 a 12 − 5 a 12 + z 8 a 10 + 10 z 6 a 10 + 25 z 4 a 10 + 21 z 2 a 10 + 4 a 10 − z 10 a 8 − 8 z 8 a 8 − 21 z 6 a 8 − 24 z 4 a 8 − 11 z 2 a 8 + z 8 a 6 + 7 z 6 a 6 + 15 z 4 a 6 + 11 z 2 a 6 + a 6 {\displaystyle z^{2}a^{14}+a^{14}-5z^{4}a^{12}-11z^{2}a^{12}-5a^{12}+z^{8}a^{10}+10z^{6}a^{10}+25z^{4}a^{10}+21z^{2}a^{10}+4a^{10}-z^{10}a^{8}-8z^{8}a^{8}-21z^{6}a^{8}-24z^{4}a^{8}-11z^{2}a^{8}+z^{8}a^{6}+7z^{6}a^{6}+15z^{4}a^{6}+11z^{2}a^{6}+a^{6}}
