<Formula><+V>(A^2*(H1+H2)^2)/(4*(H1+H2+H3+H4))</+V><-V>(A^2*(H3+H4)^2)/(4*(H1+H2+H3+H4))</-V></Formula><Formula><+V>(A/8)*(B+C)*(H1+H2)</+V><-V>(A/8)*(2*A-(B+C))*(H3+H4)</-V></Formula><Formula><+V>(A^2/4)*(H1^2/(H1+H4)+H2^2/(H2+H3))</+V><-V>(A^2/4)*(H4^2/(H1+H4)+H3^2/(H2+H3))</-V></Formula>