###INSTRUCTION: Fix grammaticality in this sentence: My reviser taught me the importance of writing a flawless English texts, out a focus on achieving formality, proper to the professional and executive environment.
###RESPONSE: 
My reviser has taught me the importance of writing a flawless English text, with a focus on achieving formality that is proper in the professional and executive environment.
My reviser taught me the importance of writing flawless English texts, out of focus on achieving formality, and proper to the professional and executive environments