diff --git a/.nrepl-port b/.nrepl-port
new file mode 100644
index 00000000..f24177d5
--- /dev/null
+++ b/.nrepl-port
@@ -0,0 +1 @@
+55107
\ No newline at end of file
diff --git a/src/structured_data.clj b/src/structured_data.clj
index ebfe1ce4..0c4ebb02 100644
--- a/src/structured_data.clj
+++ b/src/structured_data.clj
@@ -1,70 +1,119 @@
 (ns structured-data)
 
 (defn do-a-thing [x]
-  :-)
+  (let [numero (+ x x)]
+  (Math/pow numero numero)))
 
 (defn spiff [v]
-  :-)
+  (+ (get v 0) (get v 2)))
 
 (defn cutify [v]
-  :-)
+  (conj v "<3"))
 
 (defn spiff-destructuring [v]
-  :-)
+  (let [[x y z] v]
+  (+ x z)
+  ))
+
+
 
 (defn point [x y]
-  [x y])
+ [x y])
 
 (defn rectangle [bottom-left top-right]
   [bottom-left top-right])
 
 (defn width [rectangle]
-  :-)
+  (let [[[x1 y1] [x2 y2]] rectangle]
+    (- x2 x1)
+    ))
 
 (defn height [rectangle]
-  :-)
+  (let [[[x1 y1] [x2 y2]] rectangle]
+    (- y2 y1)
+    ))
 
 (defn square? [rectangle]
-  :-)
+  (let [[[x1 y1] [x2 y2]] rectangle]
+    (if (== (- x2 x1) (- y2 y1)) true false))
+  )
+
+;(defn area [rectangle]
+; (let [[[x1 y1] [x2 y2]] rectangle]
+;    (* (- x2 x1) (- y2 y1)))
+;  )
+
+  (defn area [rec]
+        (* ((height (rec))) ((width (rec))))
+  )
+
+
+(defn contains-point? [recta poi]
+  (let [[[x1 y1] [x2 y2]] recta
+        x3 (get poi 0)
+        y3 (get poi 1)]
+   (if(and (<= x1 x3 x2) (<= y1 y3 y2)) true false)
+  ))
 
-(defn area [rectangle]
-  :-)
 
-(defn contains-point? [rectangle point]
-  :-)
 
 (defn contains-rectangle? [outer inner]
-  :-)
+  (let [[[x1 y1] [x2 y2]] outer
+        [[xx1 yy1] [xx2 yy2]] inner
+        ]
+        (if(and (contains-point? (rectangle [x1 y1] [x2 y2]) (point xx1 yy1)) (contains-point? (rectangle [x1 y1] [x2 y2]) (point xx2 yy2))) true false)
+  ))
+
 
 (defn title-length [book]
-  :-)
+  (count (get book :title))
+  )
 
 (defn author-count [book]
-  :-)
+  (count (get book :authors))
+  )
 
 (defn multiple-authors? [book]
-  :-)
+  (if (< 1 (count (get book :authors))) true false)
+  )
+
 
 (defn add-author [book new-author]
-  :-)
+  (let [auts (get book :authors)
+        new_auts (conj auts new-author)
+        ]
+
+  (assoc book :authors new_auts)
+   ))
+
 
 (defn alive? [author]
-  :-)
+  (if (contains? author :death-year) false true)
+    )
 
 (defn element-lengths [collection]
-  :-)
+  (map count collection)
+  )
 
 (defn second-elements [collection]
-  :-)
+  (let [getsecond (fn[x] (get x 1))]
+  (map getsecond collection)
+  ))
 
 (defn titles [books]
-  :-)
+  (map :title books)
+  )
 
 (defn monotonic? [a-seq]
   :-)
 
+
 (defn stars [n]
-  :-)
+  (apply str (repeat n (str \*))
+  )
+)
+
+(stars 3)
 
 (defn toggle [a-set elem]
   :-)