no goals
ι : Type ?u.17157
α : Type u_1
β : Type ?u.17163
γ : Type ?u.17166
m0 : MeasurableSpace α
μ : Measure α
s✝ t s : Set α
ht : NullMeasurableSet t
⊢ ↑↑μ (s ∪ t) + ↑↑μ (s ∩ t) = ↑↑μ s + ↑↑μ t
rw [← measure_inter_add_diff₀ (s ∪ t) ht, union_inter_cancel_right, union_diff_right, ←
  measure_inter_add_diff₀ s ht, add_comm, ← add_assoc, add_right_comm]