[tex] \frac{x}{y} \int\limits^a_b {x} \, dx \left \{ {{y=2} \atop {x=2}} \right. \sqrt{x} \left[\begin{array}{ccc}1&2&3\\4&5&6\\7&8&9\end{array}\right] \neq \\ x^{2} \pi \sqrt{x} \beta \sqrt[n]{x} \left \{ {{y=2} \atop {x=2}} \right. \frac{x}{y} \int\limits^a_b {x} \, dx x_{123} \lim_{n \to \infty} a_n x^{123} \leq \geq \left[\begin{array}{ccc}1&2&3\\4&5&6\\7&8&9\end{array}\rig[/tex]
