∀ {C₁ : Type u_1} {C₂ : Type u_2} {C₁₂ : Type u_3} {C₃ : Type u_5} {C₄ : Type u_6}
  [inst : CategoryTheory.Category.{v_1, u_1} C₁] [inst_1 : CategoryTheory.Category.{v_2, u_2} C₂]
  [inst_2 : CategoryTheory.Category.{v_3, u_5} C₃] [inst_3 : CategoryTheory.Category.{v_4, u_6} C₄]
  [inst_4 : CategoryTheory.Category.{v_5, u_3} C₁₂] [inst_5 : CategoryTheory.Limits.HasZeroMorphisms C₁]
  [inst_6 : CategoryTheory.Limits.HasZeroMorphisms C₂] [inst_7 : CategoryTheory.Limits.HasZeroMorphisms C₃]
  [inst_8 : CategoryTheory.Preadditive C₁₂] [inst_9 : CategoryTheory.Preadditive C₄]
  (F₁₂ : CategoryTheory.Functor C₁ (CategoryTheory.Functor C₂ C₁₂))
  (G : CategoryTheory.Functor C₁₂ (CategoryTheory.Functor C₃ C₄)) [inst_10 : F₁₂.PreservesZeroMorphisms]
  [inst_11 : ∀ (X₁ : C₁), (F₁₂.obj X₁).PreservesZeroMorphisms] [inst_12 : G.Additive]
  [inst_13 : ∀ (X₁₂ : C₁₂), (G.obj X₁₂).PreservesZeroMorphisms] {ι₁ : Type u_7} {ι₂ : Type u_8} {ι₃ : Type u_9}
  {ι₁₂ : Type u_10} {ι₄ : Type u_12} [inst_14 : DecidableEq ι₄] {c₁ : ComplexShape ι₁} {c₂ : ComplexShape ι₂}
  {c₃ : ComplexShape ι₃} (K₁ : HomologicalComplex C₁ c₁) (K₂ : HomologicalComplex C₂ c₂) (K₃ : HomologicalComplex C₃ c₃)
  (c₁₂ : ComplexShape ι₁₂) (c₄ : ComplexShape ι₄) [inst_15 : TotalComplexShape c₁ c₂ c₁₂]
  [inst_16 : TotalComplexShape c₁₂ c₃ c₄] [inst_17 : K₁.HasMapBifunctor K₂ F₁₂ c₁₂] [inst_18 : DecidableEq ι₁₂]
  [inst_19 : (K₁.mapBifunctor K₂ F₁₂ c₁₂).HasMapBifunctor K₃ G c₄] {i₁ i₁' : ι₁},
  c₁.Rel i₁ i₁' →
    ∀ (i₂ : ι₂) (i₃ : ι₃) (j : ι₄),
      HomologicalComplex.mapBifunctor₁₂.d₁ F₁₂ G K₁ K₂ K₃ c₁₂ c₄ i₁ i₂ i₃ j =
        (c₁₂.ε₁ c₃ c₄ (c₁.π c₂ c₁₂ (i₁, i₂), i₃) * c₁.ε₁ c₂ c₁₂ (i₁, i₂)) •
          CategoryTheory.CategoryStruct.comp ((G.map ((F₁₂.map (K₁.d i₁ i₁')).app (K₂.X i₂))).app (K₃.X i₃))
            (HomologicalComplex.mapBifunctor₁₂.ιOrZero F₁₂ G K₁ K₂ K₃ c₁₂ c₄ i₁' i₂ i₃ j)