diff --git a/3/assig.org b/3/assig.org
index aa2596c..a9d6cf3 100644
--- a/3/assig.org
+++ b/3/assig.org
@@ -98,13 +98,10 @@ Hint: If you want to make use of addition in the implementation of multiplicatio
   { Zero() -> Zero()
   ; Succ(n) -> add m (mult n)
   } 
-#+end_src
-where we substitute ~add~ for the following:
-#+begin_src chi
-\m. rec add = \n. case n of
-  { Zero() -> m
-  ; Succ(n) -> Suc(add n)
-  } 
+[ add <- \m. rec add = \n. case n of
+                { Zero() -> m
+                ; Succ(n) -> Suc(add n)
+                }]
 #+end_src
 
 ** (2p) [BN]