Hi, I'm now using ECJ to do a symbolic regression job. In order to make the result tree easy and nice, I have set the max tree depth to 7 instead of default 17. And my way of achiving the utimate formula is by using the Graphviz to get a visual tree and then calculating the tree manually. Considering that this method is abviously tricky and time-consuming, I'm wondering if there is another way I can go to break and simplify a dreadful Lisp expresson. Please help me with it, thank you so much !