Calling the Evaluator Explicitly (Cont.)

> (define exp '(+ 3 4 (* 5 6) 7 8))

(+ 3 4 (* 5 6) 7 8)

> (eval exp)

52

> (eval (cons '* (cdr exp)))

20160

; = (* 3 4 (* 5 6) 7 8)

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