The phrase "avoid expressing" is correct and usable in written English.
It can be used when advising someone to refrain from articulating a particular thought or feeling.
Example: "In sensitive discussions, it is often best to avoid expressing strong opinions that may lead to conflict."
Alternatives: "refrain from stating" or "steer clear of articulating".
Rousseff's only campaign strategy is to be seen with Lula as much as possible and avoid expressing any independent opinion.
Ms. Schapiro and the commission staff were careful to avoid expressing an opinion on the issue of global warming itself.
In the first lecture, about how the impenetrable language of the art world is used to avoid expressing a clear opinion, you use a lot of comedy.
They must also avoid expressing opinions which, were it to become known that they hold judicial office, could damage public confidence in their own impartiality or in the judiciary in general.
The Times's ethical guideline states that news staffers appearing on radio or television "should avoid expressing views that go beyond what they would be allowed to say in the paper".
Rodgers's quotation shines a light on a major problem gripping the N.F.L.: ridiculous humility, the absurd self-denigration to which great players succumb when they avoid expressing satisfaction or joy at achieving anything short of seven straight Super Bowl championships.
Mr. Cuomo avoided expressing an opinion.
Whyte avoided expressing the significance of the Organization Man in dull statistical terms.
Initially, Kennedy avoided expressing support for King, because he worried about losing white votes in the South.
Allen P. Adamson, managing director at Landor Associates, a brand design firm, avoided expressing an opinion about the name.
He had stood by and watched as an empire fell and a nation rose, and avoided expressing an opinion on the matter.
