This article is available in: To enter mathematical expressions, LaTeX syntax is used. Instructions for use of LaTeX can be found on the Internet, for example here: Mathematical expressions to be displayed in a line between the text must be enclosed in two dollars, for instance: $x^3 = 9$. Expressions (formulas) to be displayed on a separate line must be enclosed in two dollars $$ ... $$. There are examples of often used expressions: Example of one question card: The dollar sign is used for entering mathematical expressions. If you need to use the dollar sign in different situation e.g. excel expressions insert a backslash before the dollar sign: \$. The system will recognize this sign and it will not consider the dollar sign as the beginning of a mathematical expression.
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