"free from difficulty" is a correct and usable phrase in written English.
You can use it when you want to express that something is without difficulty or complications. For example, "The instructions were easy to follow and the project was free from difficulty."
The academy's beginnings were quite modest German professors lectured in Latin to a handful of poorly prepared students—and its development was not free from difficulties, but at the end of the 18th century it was a leading European centre of science and enlightenment, preparing and guiding Russia's scientific and technological flowering in the 19th century.
Seeing such an abundance of resources for research, and a life so free from any difficulty in these garden cities, can only make us think: but might it not be that the price for all this is the death of the soul?
Choice of tolerant species, varieties, and rootstocks may make fruit growing economical on imperfectly drained or mildly saline sites, though plants rarely perform as well as they do on sites free from these difficulties.
To overcome these difficulties, Molodtsov introduced the concept of a soft set as a new mathematical tool for dealing with uncertainties that is free from the difficulties affecting the existing methods.
Though free from some difficulties inherent in Lewis's theoretical machinery, modal dimensionalism has its own obstacles to overcome, not the least of which is to make substantive sense of the idea of an object's persisting not just in physical space and time but in modal space.
On the contrary, heuristic methods are suitable for stochastic global search, free from problem formulation difficulties and can escape from premature local optimal.
No one else confronted so directly the sheer intractability of American social life and institutions, or dramatized with such solicitousness and compassion the difficulty of breaking free from social law.
Different materials vary greatly in their ability to conduct electricity, depending directly on the ease or difficulty of setting electrons free from their atoms.
Contaminant-free cell cultures from intestine and skin were difficult to establish because of the obvious difficulty in obtaining tissues free from bacterial and fungal contamination.
