diff --git a/Qpf/Macro/Comp.lean b/Qpf/Macro/Comp.lean
index f913e56..9ce8c42 100644
--- a/Qpf/Macro/Comp.lean
+++ b/Qpf/Macro/Comp.lean
@@ -310,14 +310,17 @@ def elabQpfCompositionBody (view: QpfCompositionBodyView) :
       res.F.check
       res.qpf.check
 
-      withOptions (fun opt => opt.insert `pp.explicit true) <| do
+      let (F, qpf) ← withOptions (fun opt => opt.insert `pp.explicit true) <| do
         let F ← delab res.F
         let qpf ← delab res.qpf
-
-        withQPFTraceNode "results …" <| do
-          trace[QPF] "Functor := {F}"
-          trace[QPF] "MvQPF instance := {qpf}"
-        return ⟨F, qpf⟩
+        pure (F, qpf)
+
+      withQPFTraceNode "results …" <| do
+        trace[QPF] "Functor (expr) := {res.F}"
+        trace[QPF] "Functor (stx)  := {F}"
+        trace[QPF] "MvQPF   (expr) := {res.qpf}"
+        trace[QPF] "MvQPF   (stx)  := {qpf}"
+      return ⟨F, qpf⟩
 
 
 structure QpfCompositionView where
diff --git a/Qpf/Qpf/Multivariate/Basic.lean b/Qpf/Qpf/Multivariate/Basic.lean
new file mode 100644
index 0000000..b28c324
--- /dev/null
+++ b/Qpf/Qpf/Multivariate/Basic.lean
@@ -0,0 +1,15 @@
+import Mathlib.Data.QPF.Multivariate.Basic
+import Qpf.Util.TypeFun
+
+namespace MvQPF
+variable {n} {F : TypeFun n}
+
+instance instMvFunctor_ofCurried_curried [f : MvFunctor F] :
+    MvFunctor <| TypeFun.ofCurried <| F.curried :=
+  TypeFun.ofCurried_curried_involution ▸ f
+
+instance instQPF_ofCurried_curried [q : MvQPF F] :
+    MvQPF <| TypeFun.ofCurried <| F.curried :=
+  TypeFun.ofCurried_curried_involution ▸ q
+
+end MvQPF