Not always - you can write a sentance such as:
This experiment is complex (you will need: salt, water, etc.) or;
This experiment is complex (you will need many items), such as salt, water, etc.
Yes, because when you divide you divide the # outside of the braket which is the dividend.
No, not always.
With NO exceptions, periods and commas go INSIDE the quotation marks. However, question marks (if the question comes at the end of the sentence) are put following the clause with the quotation marks outside the question mark. If there are two clauses within the sentence separated by a conjunction, and there is a semi colon required, the semi colon at the end of the first clause goes outside the quotation marks.
Outside, like: The car was John's, so he had to pay for the repairs. However, if you are using the apostrophes as single quotation marks, then inside. Commas and periods always go inside quotation marks. "Like this."
Quotation marks typically go before or after commas, depending on whether the comma is part of the quoted material. If the comma is part of the quoted material, it goes inside the quotation marks. If the comma is not part of the quoted material, it goes outside the quotation marks.
Yes, but not always.
In American English, commas always go inside the quotation marks when separating multiple poem titles. For example: "The Road Not Taken," "Stopping by Woods on a Snowy Evening," and "O Captain! My Captain!"
Single commas around extracts are called "quotation marks" or "inverted commas". They are used to indicate that the text inside them is a direct quotation or a piece of text being highlighted.
British style places commas and periods that are not part of the quoted material outside of the quotation marks. Also, in technical applications or when discussing coding, punctuation that is not part of a text string should be placed outside of the quotes. Placing commas and periods inside the quotes implies that they are part of the string to be displayed.
They, appositives, are almost always separated by commas. Take the word appositive in the previous sentence. It is itself an appositive in this case.
In American English, periods and commas are typically placed inside final quotation marks, while colons and semicolons are placed outside.
Yes, in American English, commas always go inside quotation marks, regardless of how many titles are in the sentence. For example: "I listened to 'Shape of You,' 'Despacito,' and 'Havana' on the radio yesterday."