Slawomir Kolodynski wrote:
>
> Suppose I have an expression like *(y-m)*sqrt(x)/s* . What I would like to
> do is to give a name *e* to the *sqrt(x)/s* part and do some kind of
> transformation on this expression so that I get *(y-m)*e *or equivalent as
> the result*. *To do that I define a
Suppose I have an expression like *(y-m)*sqrt(x)/s* . What I would like to
do is to give a name *e* to the *sqrt(x)/s* part and do some kind of
transformation on this expression so that I get *(y-m)*e *or equivalent as
the result*. *To do that I define a rule
substE := rule
