diff --git a/SICP/exercise_1_3.janet b/SICP/exercise_1_3.janet
new file mode 100644
index 0000000..893091e
--- /dev/null
+++ b/SICP/exercise_1_3.janet
@@ -0,0 +1,17 @@
+(defn max [a b]
+  (if (> a b) a b))
+
+(defn min [a b]
+  (if (> a b) b a))
+
+(defn square [a]
+  (* a a))
+
+(defn sum-of-squares [a b c]
+  (-
+    (+ (square a) (square b) (square c))
+    (square (min a (min b c)))))
+
+(print (sum-of-squares 1 2 3))
+(print (sum-of-squares 3 1 2))
+(print (sum-of-squares 2 3 1))