Allow all special charecter , user should not be able to enter html tags [closed]

I want to allow all special character , user should not be able to enter html tags.
500 words should be accept max . How to do this?

 $attributes = $request->validate([
            'video_id' => 'required',
            'package_id' => 'required',
            'question' => 'required|max:200|regex:/^[.a-zA-Z0-9n,!?-' ]*$/',
            'time' => ''
        ]);

This is my current code .