anchor.diff:          (cond ((> a 0) :positive)
                 ((< a 0) :negative)
                 (t :zero)))
  -  (assert-equal ____ c))
  +  (assert-equal :positive c))
   
   
   (defun cartoon-dads (input)
     " you should be able to complete this cond statement"
  -  (cond ((equal input :this-one-doesnt-happen) :fancy-cat)
  +  (cond ((equal input :bart) :homer)
  +        ((equal input :stewie) :peter)
  +        ((equal input :stan) :randy)
           (t :unknown)))
   
   (define-test test-your-own-cond-statement
  
positive.code:   (setf a 100)
    (let ((a 5)
          (b (* 10 a)))
      (assert-equal b ___)))
  
  (define-test test-let*-bindings-are-series
      "let* is like let, but successive bindings may use values of previous ones"
    (setf a 100)
    (let* ((a 5)
           (b (* 10 a)))
      (assert-equal b ___))
    (assert-equal a ___))
  
  
  (define-test write-your-own-let-statement
  
negative.code:   (setf a 100)
    (setf b 23)
    (setf c 456)
    (let ((a a)
          (b (* a 2))
          (c "Jellyfish"))
      (assert-equal a 100)
      (assert-equal b 200)
      (assert-equal c "Jellyfish"))
    (let* ((a 121)
           (b 200)
           (c (+ a (/ b a))))
      (assert-equal a 121)
      (assert-equal b 200)
      (assert-equal c (+ a (/ b a)))))
  