New features generated from SymbolicTransformer do not match the rule?

Question

I have same features.I put them into SymbolicTransformer, fit. This is the result of fit :

[sqrt(X145), log(div(add(div(div(X270, X568), sub(X177, X147)), neg(sqrt(X3))), sqrt(div(log(X240), sub(X32, X481))))), blablabla...]

The column of X145:

After transform, the column of new feature generated from sqrt(X145)（the first column of new features） is:

I suppose the column sqrt(X145) is:

[sqrt(0), sqrt(5), sqrt(2), sqrt(10), sqrt(15)]

Obviously, I have some misunderstanding with SymbolicTransformer about generating features. Please correct me if I am wrong.