cs375 p. 76

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Examples

(expr '(a + b) )
 ==> (+ A B)
(expr '(x := a + b * c) )
 ==> (:= X (+ A (* B C)))
(expr '(x := a * b + c) )
 ==> (:= X (+ (* A B) C))
(expr '(x := (a + b) * (c + d * e) + f) )
 ==> (:= X (+ (* (+ A B) (+ C (* D E))) F))