Shortcut for Element and Substitute - Please, please, please
These two go together very often e.g. when getting parts of a solution of a equation.
Nesting these two often gives very long, very hard to read expressions.
Even for a simple example:
this is a big expression.
In Maxima for example there is a postfix operator for substitution and a simple shortcut for getting elements of lists
What I would like to have is a shortcut - could the parser do this?