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Equation Icon  ∑ ∫ ------ Ψ (t,𝜃,ϕ) = ψ (t)Y (− 2)(𝜃,ϕ ) ⇔ ψ (t) = Ψ (t,𝜃,ϕ)Y (− 2)(𝜃,ϕ) dΩ , (151 ) 4 lm lm lm 4 lm 2 lm