Test page for MediaWiki:Gadget-eq.js: Ctrl-click an equation.

Plain display

Unnumbered, one line: \begin{equation}\label{eq:0Ayrp}E=mc^2\,.\end{equation}

Unnumbered on several lines: $$ a^2+b^2 =c^2 $$

Starred equation: \begin{equation*} \int_0^1 x\,dx=\frac12 \end{equation*}

Equation, no label: \begin{equation} e^{i\pi}+1=0 \end{equation}

Numbered equation: \begin{equation}\label{eq:0TEST} \sum_{n=1}^\infty\frac1{n^2}=\frac{\pi^2}6 \end{equation}

Labelled but in double dollars (not numbered): $$\zeta(3)\approx1.202\label{eq:1TEST}$$

Rows

Align, second row labelled: \begin{align} x&=1\\ y&=2\label{eq:2TEST}\\ z&=3 \end{align}

Align starred: \begin{align*} u&=\begin{pmatrix}1&0\\0&1\end{pmatrix}\\ v&=w \end{align*}

Aligned in equation, labelled: \begin{equation}\label{eq:3TEST} \begin{aligned} p&=q\\ r&=s \end{aligned} \end{equation}

Gather in double dollars: $$\begin{gather} A=B\\ C=D\label{eq:4TEST} \end{gather}$$

Subequations: \begin{subequations}\label{eq:5TEST} \begin{align} f&=g\label{eq:6TEST}\\ h&=k \end{align} \end{subequations}

Multline: \begin{multline} a+b+c\\ +d+e \end{multline}

Reference: Eq. \eqref{eq:0TEST}, Eq. \eqref{eq:2TEST}.