variable names and order



Hi,

I could not figure out the answers to the following:

1. Maxima reorders terms for commutative operators,

(%i1) a=b+c;
(%o1)                              a = c + b

Is it possible to preserve the original order in the underlying
S-expression, so that when I need a LaTeX fragment I get the original
order?  Also, is it possible to influence/change ordering of results?

2. If I have a variable that I want to show up as \lambda_e in LaTeX
(and rendered as such in imaxima), what should I name it?  lambda[e]
does not work when I am solving equations.  Also, how can I get a
variable named W^* or W^+ (ie as a single variable name)?

Best,

Tamas