( and ( ( ( the ( more simple ) ) ( ( a machine ) ( , ( ( the ( more valuable ) ) ( it is ) ) ) ) ) . ) )
(ROOT (FRAG (CC and) (NP (NP (DT the) (JJR more) (NN simple)) (SBAR (S (NP (DT a) (NN machine)) (, ,) (X (DT the) (RBR more) (JJ valuable)) (NP (PRP it)) (VP (VBZ is)))) (. .))))
and the more simple a machine, the  more valuable it is.
(ROOT (S (S (NP (DT A) (JJ complex) (NN machine)) (VP (VBZ is) (VP (VBN described) (PP (IN by))))) (: :) (S (NP (PRP it)) (VP (VBZ is) (VP (VBN made) (PP (IN of) (NP (QP (JJR more) (IN than) (CD one)) (JJ simple) (NN machine)))))) (. .)))
A complex machine is described by: it is made of more than one simple machine.