(not (= (car (car foo))
(car (car bar))))))
+; TREE-EQUAL
+(test (tree-equal '(1 2 3) '(1 2 3)))
+(test (tree-equal '(1 (2 (3 4) 5) 6) '(1 (2 (3 4) 5) 6)))
+(test (tree-equal (cons 1 2) (cons 2 3)
+ :test (lambda (a b) (not (= a b)))))
+
+; FIRST to TENTH
+(let ((nums '(1 2 3 4 5 6 7 8 9 10)))
+ (test (= (first nums) 1))
+ (test (= (second nums) 2))
+ (test (= (third nums) 3))
+ (test (= (fourth nums) 4))
+ (test (= (fifth nums) 5))
+ (test (= (sixth nums) 6))
+ (test (= (seventh nums) 7))
+ (test (= (eighth nums) 8))
+ (test (= (ninth nums) 9))
+ (test (= (tenth nums) 10)))
+
; SUBST
; Can't really test this until EQUAL works properly on lists