Html elements command, embed, and sub

command element The command element represents a command which the user can invoke, embed element Defines an object, such as a multimedia file, embedded in an HTML document, sub element Specifies that the enclosed text should be rendered in the browser as subscript. These elements allows child elements from interactive, embedded, heading, sectioning, phrasing, and metadata content categories.

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command command and embed, command, embed, and sub

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