This question already has an answer here:
I'm trying to draw parse trees for mathematical expressions such as
(x + (y - z)).
When I google for parse trees in LaTeX, all I get are packages that produce an output similar to the style of this package:
However, the notation used at my university doesn't resemble that at all. Our parse trees look like this:
Or like this (using a slightly different notation that doesn't show the intermediate nodes):
I'm stuck for what to do. Are there any packages that will produce this kind of output that I haven't come across?