Add spaces: Someofthesearecommerciallyavailable,buthavenotbeenfullystudied.

Answer: Some of these are commercially available, but have not been fully studied.

Add spaces: TransferEchternachAirportParisCharlesdeGaulle

Answer: Transfer Echternach Airport Paris Charles de Gaulle

Add spaces: [Hausdorff's]broadapproach,hisaestheticfeeling,andhissenseofbalancemayhaveplayedasubstantialpart.

Answer:
[Hausdorff's] broad approach, his aesthetic feeling, and his sense of balance may have played a substantial part.