∀ {C : Type u_3} [inst : CategoryTheory.Category.{u_1, u_3} C] {A : Type u_4}
  [inst_1 : CategoryTheory.Category.{u_2, u_4} A] (J : CategoryTheory.GrothendieckTopology C)
  [inst_2 : CategoryTheory.CartesianMonoidalCategory A] (X Y Z : CategoryTheory.Sheaf J A),
  CategoryTheory.CategoryStruct.comp
      (CategoryTheory.MonoidalCategoryStruct.whiskerRight
        (CategoryTheory.Iso.refl
            (CategoryTheory.MonoidalCategoryStruct.tensorObj ((CategoryTheory.sheafToPresheaf J A).obj X)
              ((CategoryTheory.sheafToPresheaf J A).obj Y))).hom
        ((CategoryTheory.sheafToPresheaf J A).obj Z))
      (CategoryTheory.CategoryStruct.comp
        (CategoryTheory.Iso.refl
            (CategoryTheory.MonoidalCategoryStruct.tensorObj
              ((CategoryTheory.sheafToPresheaf J A).obj (CategoryTheory.MonoidalCategoryStruct.tensorObj X Y))
              ((CategoryTheory.sheafToPresheaf J A).obj Z))).hom
        ((CategoryTheory.sheafToPresheaf J A).map (CategoryTheory.MonoidalCategoryStruct.associator X Y Z).hom)) =
    CategoryTheory.CategoryStruct.comp
      (CategoryTheory.MonoidalCategoryStruct.associator ((CategoryTheory.sheafToPresheaf J A).obj X)
          ((CategoryTheory.sheafToPresheaf J A).obj Y) ((CategoryTheory.sheafToPresheaf J A).obj Z)).hom
      (CategoryTheory.CategoryStruct.comp
        (CategoryTheory.MonoidalCategoryStruct.whiskerLeft ((CategoryTheory.sheafToPresheaf J A).obj X)
          (CategoryTheory.Iso.refl
              (CategoryTheory.MonoidalCategoryStruct.tensorObj ((CategoryTheory.sheafToPresheaf J A).obj Y)
                ((CategoryTheory.sheafToPresheaf J A).obj Z))).hom)
        (CategoryTheory.Iso.refl
            (CategoryTheory.MonoidalCategoryStruct.tensorObj ((CategoryTheory.sheafToPresheaf J A).obj X)
              ((CategoryTheory.sheafToPresheaf J A).obj (CategoryTheory.MonoidalCategoryStruct.tensorObj Y Z)))).hom)