za5 + 2a5z−1 + a5z−3−3z3a3−8za3−8a3z−1−3a3z−3 + 2z5a + 9z3a + 15za + 11az−1 + 3az−3−z5a−1−7z3a−1−11za−1−6a−1z−1−a−1z−3 + z3a−3 + 3za−3 + a−3z−1