WorksheetSeriesSum[λ,n,ConstE,μ]Product[λ,Sum[μ,1,Negative[ConstE]]]WorksheetDeriv[SeriesSum[λ,n,ConstE,μ],λ]Sum[μ,1,Negative[ConstE]]WorksheetIndefiniteIntegral[SeriesSum[λ,n,ConstE,μ],λ]Sum[Divide[Product[Sum[μ,1,Negative[ConstE]],Exponent[λ,2]],2],&c]WorksheetExpand[SeriesSum[λ,n,ConstE,μ]]Sum[Product[λ,μ],Negative[Product[ConstE,λ]],λ]