amsmath align code example
Example 1: how to align math equations in latex
\begin{align*}
x&=y & w &=z & a&=b+c\\
2x&=-y & 3w&=\frac{1}{2}z & a&=b\\
-4 + 5x&=2+y & w+2&=-1+w & ab&=cb
\end{align*}
Example 2: latex align equation
\begin{align}
(a+b)^2 &= (a+b)(a+b) \\
&= a^2+2ab+b^2
\end{align}