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Here is the code listed for Polinomial Set 2 in Fractal Explorer.

Z=Log(real(P1)*Z°*Z) + Fn1(Z)

What exactly is "Z°" for a complex number Z?
Also, this Polinomial Set 2 function uses Julia,
but I don't see the Julia parameter C in the above formula.
How do we write this code in the User Formula
compiler section of Fractal Explorer?
I have tried

Z:=CAdd(CAdd(CLn(CMul(CMul(MakeComplex(P1r,0),Z),Z)),FuncDispF(Fn1,Z)),C);

but it is not working that great.
I need to do this in order to make several modifications
by introducing several parameters, terms, etc.
Any help would be appreciated.

Thanks!