**Exercise 1.42:** Let `f`

and `g`

be two one-argument functions. The composition `f`

after `g`

is defined
to be the function \( x \mapsto f(g(x)) \). Define a procedure compose that implements composition.
For example, if `inc`

is a procedure that adds 1 to its argument,

```
((compose square inc) 6)
49
```

```
(define (compose f g)
(lambda (x) (f (g x))))
(define (square x) (* x x))
(define (inc n) (+ n 1))
```

```
> ((compose square inc) 6)
49
```