How Do Maxwell Elements in Parallel Derive Force Elongation Relationships?

[La82]

Homework Statement

Not sure this is the right place for this but here it goes...
I am trying to figure out the derivation of the force elongation relationship of the maxwell elements in parallel in order to derive it for the Kelvin Voigt elements in series.
I have attached the material that I am using, the derivation is on page 47 and I can't seem to figure out how they get the different powers of the Differentials in 2.93. The lefthand side I can easily derive, but as far as I can tell the right hand side should just be = D Delta.

It is probably really simple, but my mind is going blank at the moment.

Hope someone can help me

 

[member 553083]

out here.Homework Equations 2.93F = D * Delta^nThe Attempt at a SolutionI have been trying to solve this for some time now, but I can't seem to figure out how they get the different powers of the Differentials in 2.93. The lefthand side I can easily derive, but as far as I can tell the right hand side should just be = D Delta.