∀ {α : Type u_1} {γ : Type u_3} [inst : MeasurableSpace α] {μ : MeasureTheory.Measure α} [inst_1 : TopologicalSpace γ]
  [inst_2 : Add γ] [inst_3 : ContinuousAdd γ] (f g : α → γ) (hf : MeasureTheory.AEStronglyMeasurable f μ)
  (hg : MeasureTheory.AEStronglyMeasurable g μ),
  MeasureTheory.AEEqFun.mk f hf + MeasureTheory.AEEqFun.mk g hg = MeasureTheory.AEEqFun.mk (f + g) ⋯