} =& \mathbf{W}_{00} \mathbf{F}_{00} \mathbf{W}_{00}^\mathsf{T} + \mathbf{W}_{00} \mathbf{F}_{00} \mathbf{W}_{00}^\mathsf{T} \\ &+\mathbf{W}_{00} \mathbf{F}_{00} \mathbf{W}_{00}^\mathsf{T} +  \mathbf{W}_{00} \mathbf{F}_{00} \mathbf{W}_{00}^\mathsf{T}