LaTeX uses two built-in Mathematics mode 1. LaTeX will insert a page break into a long equation if it has additional text added using intertext without any additional commands. The second one is used to write expressions that are not part of a text or paragraph and are therefore put on separate lines.
There is also a third mode called LR mode however this is rarely used by beginners and furthermore is usually implicitly entered with other commands.
They are organized into seven classes based on their role in a mathematical expression. Inlineor text math 2. List of LaTeX mathematical symbols. The first one is used to write formulas that are part of a text.