Karagota

<math>\left.{\begin{matrix}{}\\{}\\{}\\\end{matrix}} \right]3;\frac{{5 + \sqrt 7 }}{2}\left[ {\begin{matrix}{}\\\cup \\{}\\\end{matrix}} \right]4;\frac{9}{2}\left[ {\begin{matrix}{}\\.\\{}\\\end{matrix}}\right.</math>