exam2.4.3

;; mht created on Nov 8, 2011
;; Running errors

;(+ 5(/ 1 0))
;; to produce /: division by zero

;(sin 10 20)
;; to produce sin: expects 1 argument, given 2: 10 20

;(somef 10)
;; to produce somef: name is not defined, not a parameter,
;; and not a primitive name