Simple:
* The mistake was made through pure inadvertence.
* He apologized for the inadvertence.
* The damage was caused by inadvertence.
More Complex:
* The company's inadvertent release of private information led to a public outcry.
* Her inadvertent smile betrayed her true feelings.
* Despite his best intentions, his inadvertent actions hurt her deeply.
Figurative:
* The painter's brushstrokes, though seemingly random, were guided by an almost inadvertent genius.
* The poet's words, born of inadvertence, resonated with a profound truth.
Remember, "inadvertence" typically suggests an unintentional action or oversight. Choose the sentence structure that best fits the context of your writing.