z 9 a 13 − 7 z 7 a 13 + 17 z 5 a 13 − 16 z 3 a 13 + 4 z a 13 + 2 z 10 a 12 − 12 z 8 a 12 + 24 z 6 a 12 − 18 z 4 a 12 + 5 z 2 a 12 − a 12 + 2 z 11 a 11 − 9 z 9 a 11 + 11 z 7 a 11 − 4 z 5 a 11 + 6 z 3 a 11 − 4 z a 11 + z 12 a 10 − 15 z 8 a 10 + 29 z 6 a 10 − 19 z 4 a 10 + 8 z 2 a 10 + 6 z 11 a 9 − 27 z 9 a 9 + 49 z 7 a 9 − 61 z 5 a 9 + 48 z 3 a 9 − 12 z a 9 + z 12 a 8 + 6 z 10 a 8 − 34 z 8 a 8 + 52 z 6 a 8 − 42 z 4 a 8 + 13 z 2 a 8 + a 8 + 4 z 11 a 7 − 6 z 9 a 7 − 3 z 7 a 7 − 4 z 5 a 7 + 6 z 3 a 7 − 4 z a 7 + 8 z 10 a 6 − 19 z 8 a 6 + 17 z 6 a 6 − 16 z 4 a 6 + 2 z 2 a 6 + 11 z 9 a 5 − 24 z 7 a 5 + 17 z 5 a 5 − 6 z 3 a 5 + 12 z 8 a 4 − 24 z 6 a 4 + 19 z 4 a 4 − 5 z 2 a 4 + a 4 + 10 z 7 a 3 − 16 z 5 a 3 + 12 z 3 a 3 + 6 z 6 a 2 − 5 z 4 a 2 + 2 z 2 a 2 + 3 z 5 a − 2 z 3 a + z 4 − z 2 {\displaystyle z^{9}a^{13}-7z^{7}a^{13}+17z^{5}a^{13}-16z^{3}a^{13}+4za^{13}+2z^{10}a^{12}-12z^{8}a^{12}+24z^{6}a^{12}-18z^{4}a^{12}+5z^{2}a^{12}-a^{12}+2z^{11}a^{11}-9z^{9}a^{11}+11z^{7}a^{11}-4z^{5}a^{11}+6z^{3}a^{11}-4za^{11}+z^{12}a^{10}-15z^{8}a^{10}+29z^{6}a^{10}-19z^{4}a^{10}+8z^{2}a^{10}+6z^{11}a^{9}-27z^{9}a^{9}+49z^{7}a^{9}-61z^{5}a^{9}+48z^{3}a^{9}-12za^{9}+z^{12}a^{8}+6z^{10}a^{8}-34z^{8}a^{8}+52z^{6}a^{8}-42z^{4}a^{8}+13z^{2}a^{8}+a^{8}+4z^{11}a^{7}-6z^{9}a^{7}-3z^{7}a^{7}-4z^{5}a^{7}+6z^{3}a^{7}-4za^{7}+8z^{10}a^{6}-19z^{8}a^{6}+17z^{6}a^{6}-16z^{4}a^{6}+2z^{2}a^{6}+11z^{9}a^{5}-24z^{7}a^{5}+17z^{5}a^{5}-6z^{3}a^{5}+12z^{8}a^{4}-24z^{6}a^{4}+19z^{4}a^{4}-5z^{2}a^{4}+a^{4}+10z^{7}a^{3}-16z^{5}a^{3}+12z^{3}a^{3}+6z^{6}a^{2}-5z^{4}a^{2}+2z^{2}a^{2}+3z^{5}a-2z^{3}a+z^{4}-z^{2}}