MAYBE MAYBE TRS: { +(*(x, y), *(x, z)) -> *(x, +(y, z)), +(*(x, y), +(*(x, z), u())) -> +(*(x, +(y, z)), u()), +(+(x, y), z) -> +(x, +(y, z)) } DUP: We consider a non-duplicating system. Trs: { +(*(x, y), *(x, z)) -> *(x, +(y, z)), +(*(x, y), +(*(x, z), u())) -> +(*(x, +(y, z)), u()), +(+(x, y), z) -> +(x, +(y, z)) } Fail