This equation represents

∫CVdiv(Γgradϕ)dV+∫CVSϕdV=∫An.(Γgradϕ)dA+∫CVSϕdV{"version":"1.1","math":"\int_{CV} \textbf{div}(\Gamma \textbf{grad} \phi)dV + \int_{CV} S_\phi dV=\int_{A} \textbf{n}.(\Gamma \textbf{grad} \phi)dA + \int_{CV}S_\phi dV"}