Subcommand /execute complex

Syntax: /execute complex run <command1> ; <command2> ; ... # executes several commands at once in one execute run. The returned result will be the result of the last command.

I would like to be able to execute several commands at once in one execute command, since in some situations, as for me, it is not very rational to create a separate function for literally several commands that will not be used in other commands.