Math & Science ⇒ Changing where \align puts aligned items.

[cordeliawl]

I'm trying to format a proof and I'd like to use \align so that all of the equals signs will line up. Unfortuantely my lines have very long fractions so when I do that \align puts the = in the center of the page part of my lines run off the right edge.

Is there some way I can make all of the = signs line up at a point farther to the left so that the lines will fit?

[lalop]

Code, please? My align seems to do it automatically.