YES
(ignored inputs)COMMENT reduction failed
Rewrite Rules:
   [ f(g(h(?x))) -> g(f(h(g(?x)))),
     f(?x) -> ?x,
     g(?x) -> ?x,
     h(?x) -> ?x ]
Apply Direct Methods...
Inner CPs:
   [ f(h(?x)) = g(f(h(g(?x)))),
     f(g(?x_3)) = g(f(h(g(?x_3)))) ]
Outer CPs:
   [ g(f(h(g(?x)))) = g(h(?x)) ]
not Overlay, check Termination...
Terminating, WCR
Knuth & Bendix
Direct Methods: CR

Combined result: CR
/tmp/filerwySdq.trs: Success(CR)
(9 msec.)