FabFilter

Hello!
It's hard to explain because I'm a noob in maths and my english is bad. So this the idea:
forum.image-line.com/viewtopic.php?p=858475
Does exist a formula like this for pro Q 2?

Yep!
With the help off Libreoffice calc and using values for A (55Hz;100Hz,220Hz,440Hz...)I have found this (logaritmic)equation:
f(x)=0.1249000679 ln(x)-0.2875926071
I think I can simplify it to:
f(x)=0.125 ln(x)-0.2875
Now am I right and how could I translate it to Fl studio language?