“I got so bored in the middle of this book, I didn’t bother to finish it.”

“The windows were all dark and the store looked like it was closed, so I didn’t bother to go up to the door and look at the sign.”

“Don’t bother to close the door. I’m going right back out.”

We use “not bother to (do something)” to say someone didn’t do something because it was a hassle and not worthwhile.