I looked at the parking attendant to indicate where I should park
Use a period inside the bracket to indicate the sentence inside is ending. Use a period outside of the bracket to indicate that the entire sentence (before the bracketed sentence) has ended.
The strip could indicate the presence of certain chemicals.
To indicate a sentence is unfinished.
What is a sentence for this word? I entered the contest for a chance at a prize.
Yes, if the ellipsis falls at the end of a sentence, you should use a period after it to indicate the end of the sentence.
The best way to use an apostrophe in a sentence is to show possession or to indicate a contraction.
Capitalization
You would use a caret (^) inserted above or below the error to indicate it needs to be corrected.
A bar graph is produced to indicate the quality of each answer.
You can use an underscore to remove a word out of a sentence. It can be placed where the word was.
You can use "disallow" in a sentence to indicate that something is not permitted or prohibited. For example, "The rules disallow outside food in the classroom."
Yes, forward slashes can be used in an essay to separate different elements or to indicate alternatives within a sentence.