Exercise 1.42. Let f and g be two one-argument functions. The composition f after g is defined to be the function x f(g(x)). Define a procedure compose that implements composition. For example, if inc is a procedure that adds 1 to its argument,

 
((compose square inc) 6)
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(define (compose f g)
  (lambda (x)
    (f (g x))))
 
((compose square inc) 6)