# Aligned equations

I want to have aligned equations going vertically down a page. How do I get this style?

$x_1 + x_2 + x_3 x_2 + x_4 + x_5$

What how should I do this?

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Use align environment. –  Peter Grill Oct 4 '12 at 18:41
Does this mean I have to type begin{equation} for each equation or can I type \\ when i want a new line? –  CodeKingPlusPlus Oct 4 '12 at 18:45
I tried using \begin{align} \end{align} and now tex won't compile. –  CodeKingPlusPlus Oct 4 '12 at 18:47
I am using amssym, amsmath, and amsthm –  CodeKingPlusPlus Oct 4 '12 at 18:48
AFAICT, there is no amssym package. Were you trying to load the amssymb pacakge? –  Mico Oct 4 '12 at 18:52