please help error CS1031:Type Expected

I was trying to make a ball game with a tutorial, I followed his steps and then I got this error, can you please help me fix this error

Your syntax is off. It should be the code below.

[SerializeField] Vector3 v3Force;

If you’re going to follow a tutorial then you need to pay careful attention to each and every character typed because C#, like any programming language, has strict rules on syntax and you cannot just type anything.

Also note (as shown above) you can use code-tags when posting code. You don’t need to take images of the screen.