You have changed the rules of the discussion from the other thread in midstream. Of course in complicated expressions determining which is simpler may not even be possible. But when dealing with radicals and fractions you should make every attempt to simplify the answer.

The student may not recognize the simpler form.

That could be a problem. The simpler answer usually gets the nod. If I come up with

and leave it like that and another person gets 2. Should we both get the same mark?

Henry David Thorough said,"simplify, simplify, simplify."

]]>Well,I usually cancel,but a person marking my paper should be an expert on the subject capable on recognizing different forms of an answer.

I have to disagree with that. Many teachers used to take points off for not simplifying a fraction. Mathematics is supposed to be as clear and concise as you can make it.

Simplifying fractions is often required when your answer is not in the form required by the assignment. As a matter of fact, most math instructor will demand that you always simplify results.