diff --git a/17.nix b/17.nix
new file mode 100644
index 0000000..7db57ea
--- /dev/null
+++ b/17.nix
@@ -0,0 +1,9 @@
+let
+  attrSetBonus = {f = {add = (x: y: x + y);
+                       mul = (x: y: x * y);};
+                  n = {one = 1; two = 2;};};
+in
+rec {
+  #Bonus: use only the attrSetBonus to solve this one
+  exBonus = 5 == attrSetBonus.f.add attrSetBonus.n.one ( attrSetBonus.f.add attrSetBonus.n.two attrSetBonus.n.two);
+}
\ No newline at end of file