When to use a straight infinitive vs. para + infinitive?

I always want to use para + infinitive, but my teacher corrects me a lot to not include it. For example, would the phrase “to avoid this issue” be:

“Para evitar esta tema”

Or

“Evitar esta tema”?

Because isn’t the “to” part of infinitive?

Thank you so much!

submitted by /u/iambobanderson
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