
If you have questions about the conjugation of аннулирование or Russian nouns in general, you can practice and get feedback from a professional tutor.
Мы не будем протестовать аннулирование продажи земли.
We won't protest the cancellation of the land sale.
У нас произошло аннулирование, два месяца свободны.
We just have received a cancellation that's a mere two months away.
Я нашел пункт об аннулировании.
I've found a cancellation clause.