"devise a formula" is correct and usable in written English.
You can use it when you want to suggest creating a formula or equation to solve a problem. For example: "We need to devise a formula in order to calculate the total cost of the project."
A judge would decide on its merits, and set damages or devise a formula for them.
The UN's representative was "attempting to devise a formula... which will result in affirmation of Indonesian sovereignty".
Hoping to devise a formula that expressed how velocity was encoded in the motor cortex, Schwartz trained monkeys to draw curved shapes on touch screens designed for A.T.M.s.
The immigration authorities would devise a formula to issue visas for everyone in line over seven years, giving priority to those who waited longest.
The Turks hope that the British, who hold the rotating EU presidency, will devise a formula acceptable to them (and to their public).
In particular, the Lima meeting must devise a formula to make INDCs "clear, open and compatible" in order to hold countries accountable, says a European Union official.
Mr. Thompson said his agency was devising a formula to determine what each state would get.
The answer is Willie Randolph; the challenge is devising a formula to justify the answer.
The two men devised a formula for predicting the energy yield of a nuclear weapon - a formula that remains classified, Dr. Bethe said.
But all EU countries have devised a formula to avoid causing too much offence to the Chinese, known as a "human rights dialogue".
To cut down on all this holiday paper waste, a British mathematician at the University of Leicester has devised a formula for how to most efficiently wrap a present of any shape and size.
