How to simplify each tree after generation?

[foxtran]

Sometimes, SymbolicRegression.jl generates something like unary_op(constant) and such expressions are not simplified. Is there any way to enforce simplifying after each tree generation?

[MilesCranmer]

Sorry, I missed this for some reason. The simplification should happen regularly but it is a separate step. You actually don't want to simplify every step because it can prevent certain expressions from being found which are one hop away. e.g., unary_op(constant) might become unary_op(constant + x). But if you simplify beforehand it wouldn't be able to necessary get there.