Let the nth composition of a function f(x) be denoted 
,such th 
and 
. Denote the composition of f and g by 
, and define
Let
and
Then if
(i.e., 
),
where
and composition is done in terms of components.
,such th and . Denote the composition of f and g by , and define(1)
Let
(2)
(3)
(4)
and
(5)
(6)
Then if
(i.e., ),(7)
where
and composition is done in terms of components.
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