Equation Icon  m m m m m sX = k (X ) + ā„’ ξX + δκX + δšœ–X , (180 ) sšœƒ = šœ– + δkšœƒ + ā„’ ξšœƒ + (šŸ™ + Γ κ)κ + δkšœƒ. (181 )