-let rec tweight (t: T) on t: nat \def match t with [(TSort _) \Rightarrow (S
-O) | (TLRef _) \Rightarrow (S O) | (THead _ u t0) \Rightarrow (let TMP_1 \def
-(tweight u) in (let TMP_2 \def (tweight t0) in (let TMP_3 \def (plus TMP_1
-TMP_2) in (S TMP_3))))].
+rec definition tweight (t: T) on t: nat \def match t with [(TSort _)
+\Rightarrow (S O) | (TLRef _) \Rightarrow (S O) | (THead _ u t0) \Rightarrow
+(S (plus (tweight u) (tweight t0)))].