∀ {α : Type u_2} {β : Type u_3} [inst : AddCommMonoid α] [inst_1 : PartialOrder α] [inst_2 : AddCommMonoid β]
  [inst_3 : PartialOrder β] [inst_4 : IsOrderedAddMonoid β],
  OrderAddMonoidHom.instAddOfIsOrderedAddMonoid =
    {
      add := fun f g =>
        let __src := ↑f + ↑g;
        { toAddMonoidHom := __src, monotone' := ⋯ } }