What is the difference between remark and review and comment ?Feel free to just provide example sentences.

Review = Analyse, in its whole meaning. It usually implies that you speak or write at length, not just a few phrases.
Comment = Give a description or opinion about a certain topic, usually in a short way. Maybe some phrases, or just one.
Remark = It's like comment, but much shorter. When you remark something, you give a comment about a very specific thing inside a topic (usually because, in your opinion, that thing was wrong).

Take into account that these 3 verbs have equivalent nouns, which are the same word: A review, a comment & a remark.

Example:

"The specialists have recently reviewed this new film. In general, the comments about it are very positive; however, they remarked that the plot of the story could have been better."

Hope with this example you clearly see the difference. :)