# Mathjax test

1. Tag support
$$a^2+b^2=c^2 \tag {1.1}$$

$\begin{array}{}\text{(1.1)}& {a}^{2}+{b}^{2}={c}^{2}\end{array}$

The tag of the above equation is $1.1$

1. Line break support
$$\begin{split} a &= b \\ c &= d \\ e &= f \end{split}\tag{1.2}$$

$\begin{array}{}\text{(1.2)}& \begin{array}{rl}a& =b\\ c& =d\\ e& =f\end{array}\end{array}$

This should render 3 lines, but may only render the 3 equations in just 1 line.
Try the following code:

$$\begin{split} a &= b \newline c &= d \newline e &= f \end{split}\tag{1.3}$$

$\begin{array}{}\text{(1.3)}& \begin{array}{rl}a& =b\\ c& =d\\ e& =f\end{array}\end{array}$
1. Equation array support
$$\begin{eqnarray*} x^n+y^n &=& z^n \tag{1.4} \newline x+y &=& z \tag{1.5} \end{eqnarray*}$$

$\begin{array}{}\text{(1.4)}& {x}^{n}+{y}^{n}& =& {z}^{n}\text{(1.5)}& x+y& =& z\end{array}$