Biped Bone to Drive Morph Value

[Ardak]

Hello everyone, I would request help regarding issue about expressions. I own supremely low amount of knowledge about expressions, and I have gotten this far with the help of a friend. My problem is as following:

 

I have Morpher-modifier in one object, with two objects in the Morpher-stack. The form which represents the starting form, and the form which represents the ending form. My goal would be to be able to drive the Morpher evolution by rotating a bone (at this point the bone is Bip01 R Finger). I have got into the Parameter Wiring window, and set the Biped finger bone rotation value to Bezier Float, as also is the Morpher in Bezier Float. I have given to understand that there is certain formula to guide the bone to drive the Morpher values, which should be something like this:

 

100/(the angle from which the bone begins rotation-the angle to where the bone ends rotation)

 

And the resulting value of this formula should be placed to this formula (Z_Rotation-the angle from which the bone begins rotation)*1,33(result value placed from first calculation, for example)

 

But frankly, I do not have any idea as to in what form the formula should be insterted into the parameter window?

 

Thank you for help.