Question: Derivative of Perturbation Series


I am looking to have Maple compute the following:

simplify(diff(diff(Sum(epsilon^k*apply(index(f, k), t)/k!, k = 1 .. infinity), t), epsilon, epsilon))

The return value is:


Is there any way to get this to simplify appropriately? The problem is with the case k=1, which should just be 0.

What is the best way to expand this if I want to see some of the first few terms?


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