Equation Icon  φ(t)h +φ (t)h +φ (t)h +φ (t)h +&tidle;φ(t)l 𝒜 (t)E123+𝒜 (t)E145+𝒜 (t)E246+𝒜 (t)E356 𝒱(t) = e 1 1 2 2 3 3 4 4 e 123 145 246 356 . (10.55 )