Test LaTeX

Prova plugin LaTeX.

Primo test:

f(x,y) = \begin{cases} \frac{x^2y}{x^3+y}, &\quad (x,y)\neq (0,0)\\ 0, &\quad (x,y)= (0,0)\\ \end{cases}

Secondo test:

\frac{d}{dx}\left(\frac{x+4}{x}\right)

Terzo test:

A=\begin{bmatrix}x_{11} & x_{12} & \dots \\x_{21} & x_{22} & \dots \\ \vdots & \vdots & \ddots \end{bmatrix}

Quarto test:

\biggl(\sum_n x_n^2\biggr)^{1/2}