Equation Icon  ( ) [ ( ) ] ∘ ----- ∂ˆı Δ5 ¯gˆiˆj∂ˆȷr + ∂𝜃 ---Δ5--- (rcos 𝜃)′ − ¯gˆiˆj∂ˆır ∂ˆȷr sin-𝜃 = − 4R4 det ¯g. (400 ) r (rsin𝜃 )′ r