The phrase "are unleashed from" is correct and usable in written English.
It can be used to describe the act of releasing or setting free something that was previously restrained or contained.
Example: "The animals in the sanctuary are unleashed from their cages during the day to roam freely in the open fields."
Alternatives: "are freed from" or "are released from".
Consider the powerful forces that were unleashed from 2004 to 2007 by four separate but linked business developments.
These included swimming tanks that would float on inflatable canvas water wings as they were unleashed from the landing craft, and then make their way ashore.
Every once in a while, in response to gravitational nudges from a passing star or gas cloud, a comet is unleashed from storage and comes crashing inward.
But it's not just beetroot and carrot that are being unleashed from their knobbly shackles for a life of pudding glamour.
Virgin Galactic announced last December that its LauncherOne vehicle, which will put satellites into orbit, will be unleashed from the belly of a retired 747 airliner.
The major pull is on the second floor, where many of clothes have been unleashed from their cases and the exhibition is skewed towards the kind of weddings that keep Hello! magazine in business.
As a result of Thursday's ruling, corporations have been unleashed from the longstanding ban against their spending directly on political campaigns and will be free to spend as much money as they want to elect and defeat candidates.
The Olympics — for all the warts and growing pains — remain inspirational on many levels, but what was most striking as the distance-running legends Coe and Bannister took in the spectacle was to consider how much change, how much energy can be unleashed from a process that begins with the decisions and maneuvers of so few.
It has long been a basic tenet of those who advocate the tough line in foreign policy that force, if it is to be respected, must be unleashed from time to time, and especially whenever any 'humiliation' of our country might be perceived.
