scopedunifhint.lean:28:11-28:12: error: application type mismatch
  mul x
argument
  x
has type
  Nat : Type
but is expected to have type
  ?m.α : Type ?u
mul (sorryAx ?m.α true) (sorryAx ?m.α true) : ?m.α
scopedunifhint.lean:29:11-29:17: error: application type mismatch
  mul (x, x)
argument
  (x, x)
has type
  Nat × Nat : Type
but is expected to have type
  ?m.α : Type ?u
mul (sorryAx ?m.α true) (sorryAx ?m.α true) : ?m.α
scopedunifhint.lean:33:7-33:8: error: application type mismatch
  mul x
argument
  x
has type
  Nat : Type
but is expected to have type
  ?m.α : Type ?u
sorryAx ?m.α true*sorryAx ?m.α true : ?m.α
x*x : Nat.Magma.α
x*x : Nat.Magma.α
scopedunifhint.lean:39:11-39:17: error: application type mismatch
  mul (x, x)
argument
  (x, x)
has type
  Nat × Nat : Type
but is expected to have type
  ?m.α : Type ?u
sorryAx ?m.α true*sorryAx ?m.α true : ?m.α
(x, x)*(x, x) : (Prod.Magma Nat.Magma Nat.Magma).α
scopedunifhint.lean:56:7-56:13: error: application type mismatch
  mul (x, x)
argument
  (x, x)
has type
  Nat × Nat : Type
but is expected to have type
  ?m.α : Type ?u
sorryAx ?m.α true*sorryAx ?m.α true : ?m.α