z 2 a 14 + 2 a 14 − 4 z 4 a 12 − 11 z 2 a 12 − 6 a 12 + 4 z 6 a 10 + 13 z 4 a 10 + 11 z 2 a 10 + 3 a 10 − z 8 a 8 − 2 z 6 a 8 + 2 z 4 a 8 + 4 z 2 a 8 + a 8 + 2 z 6 a 6 + 6 z 4 a 6 + 4 z 2 a 6 + a 6 {\displaystyle z^{2}a^{14}+2a^{14}-4z^{4}a^{12}-11z^{2}a^{12}-6a^{12}+4z^{6}a^{10}+13z^{4}a^{10}+11z^{2}a^{10}+3a^{10}-z^{8}a^{8}-2z^{6}a^{8}+2z^{4}a^{8}+4z^{2}a^{8}+a^{8}+2z^{6}a^{6}+6z^{4}a^{6}+4z^{2}a^{6}+a^{6}}
