How to read this Maple code from help on Maple web site

Question:How to read this Maple code from help on Maple web site

Posted: nm 10184 Product: Maple 2016

August 17 2016

I was learning about Maple, but I do not understand this code below. This does not look correct.

When I type it on my worksheet, I get these errors

Sometimes I wonder if any one at Maplesoft actually looks at their own help web pages and try to use them, or is just the poor users who do that.

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