Free Images: "bestof:Sample Calculation.jpg Use TeX \begin array l K_ 11 k_ 11 1 \dfrac 9 16 \\ K_ 12 k_ 12 1 \dfrac 3\sqrt 3 16 \\ K_ 33 k_ 33 1 +k_ 11 2 \dfrac 9 16 +\dfrac 5 2 3"