z 8 a 12 − 4 z 6 a 12 + 5 z 4 a 12 − 2 z 2 a 12 + 4 z 9 a 11 − 17 z 7 a 11 + 25 z 5 a 11 − 16 z 3 a 11 + 4 z a 11 + 6 z 10 a 10 − 21 z 8 a 10 + 18 z 6 a 10 + z 4 a 10 − 2 z 2 a 10 − 2 a 10 + 3 z 11 a 9 + 6 z 9 a 9 − 61 z 7 a 9 + 100 z 5 a 9 − 65 z 3 a 9 + 19 z a 9 + 18 z 10 a 8 − 60 z 8 a 8 + 53 z 6 a 8 − 19 z 4 a 8 + 14 z 2 a 8 − 8 a 8 + 3 z 11 a 7 + 20 z 9 a 7 − 101 z 7 a 7 + 132 z 5 a 7 − 80 z 3 a 7 + 22 z a 7 + 12 z 10 a 6 − 24 z 8 a 6 + z 6 a 6 + 2 z 4 a 6 + 10 z 2 a 6 − 7 a 6 + 18 z 9 a 5 − 51 z 7 a 5 + 56 z 5 a 5 − 34 z 3 a 5 + 8 z a 5 + 14 z 8 a 4 − 29 z 6 a 4 + 25 z 4 a 4 − 9 z 2 a 4 + a 4 + 6 z 7 a 3 − z 5 a 3 + z 6 a 2 + 8 z 4 a 2 − 5 z 2 a 2 + a 2 + 3 z 3 a − z a {\displaystyle z^{8}a^{12}-4z^{6}a^{12}+5z^{4}a^{12}-2z^{2}a^{12}+4z^{9}a^{11}-17z^{7}a^{11}+25z^{5}a^{11}-16z^{3}a^{11}+4za^{11}+6z^{10}a^{10}-21z^{8}a^{10}+18z^{6}a^{10}+z^{4}a^{10}-2z^{2}a^{10}-2a^{10}+3z^{11}a^{9}+6z^{9}a^{9}-61z^{7}a^{9}+100z^{5}a^{9}-65z^{3}a^{9}+19za^{9}+18z^{10}a^{8}-60z^{8}a^{8}+53z^{6}a^{8}-19z^{4}a^{8}+14z^{2}a^{8}-8a^{8}+3z^{11}a^{7}+20z^{9}a^{7}-101z^{7}a^{7}+132z^{5}a^{7}-80z^{3}a^{7}+22za^{7}+12z^{10}a^{6}-24z^{8}a^{6}+z^{6}a^{6}+2z^{4}a^{6}+10z^{2}a^{6}-7a^{6}+18z^{9}a^{5}-51z^{7}a^{5}+56z^{5}a^{5}-34z^{3}a^{5}+8za^{5}+14z^{8}a^{4}-29z^{6}a^{4}+25z^{4}a^{4}-9z^{2}a^{4}+a^{4}+6z^{7}a^{3}-z^{5}a^{3}+z^{6}a^{2}+8z^{4}a^{2}-5z^{2}a^{2}+a^{2}+3z^{3}a-za}