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I'm having a problem with polynomials. Let's say I have a polynomial "2x^2 - 5x + 6 - 3x^2" .. How can I check that this expression is not simplified ? Additionally, I would like to locate the uncombined terms (2x^2 and -3x^2) and print them. I tried a lot of polynomial built-in functions, all of them simplify the expression before output.. For example, 

MonomialList[2 x^2 - 5 x + 6 - 3 x^2] 
{-x^2, -5 x, 6}

Is there any command to suppress automatic simplification ? Thanks.

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    $\begingroup$ List @@@ HoldForm[2 x^2 - 5 x + 6 - 3 x^2] or Cases[List @@@ HoldForm[2 x^2 - 5 x + 6 - 3 x^2], _ x^2, Infinity] $\endgroup$ Commented Feb 19, 2013 at 12:39

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Answered by Artes in a comment to the question.

You can use

List @@@ HoldForm[2 x^2 - 5 x + 6 - 3 x^2]

or

Cases[List @@@ HoldForm[2 x^2 - 5 x + 6 - 3 x^2], _ x^2, Infinity]
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