allign image center bottom latex code example
Example 1: center image latex
\begin{center}
\includegraphics{yourimage}
\end{center}
Example 2: latex eqnarray centering
\begin{eqnarray*}
&x + (y - 2)^4 = w^2 \\
&(x - 9)^2 + y_2^2 = w^2 \\
&x + (y - 2)^4 = w^2 = (x - 9)^2 + y_2^2 \\
\end{eqnarray*}