Valery, the point was not how to solve that one expression I grabbed as an example, thats nonsignifcant. Look at the sheets - you will read about blue underline cursors you can expand by pressing space, read about adding plots by typing a comma, etc., etc. The conversion of those sheets is simply a sloppy work - no wonder, a lot of sheets to do probably in a short time. But as you can read I didn't aim my post at a specific person but at PTC staff in general
To stay with the phrase you cited and taking the first meaning in the link you provided: PTC has a new piano which is still out of tune and an old one which is not. Somebody is responsible for the fact that the wrong one is already played.
Addendum: The sheets which are now converted to feign content existing for Prime are older than I thought. Not even Mathcad 15 will yield the result given using static symbolics. So obviously those sheets were written for something like Mathcad 11 with Maple as symbolics. Great job!
@Tudor, as I assume that you are not only the person who posted the sheets but also the one whose task was to convert them: I am sorry to have to say that, but ist not enough to simply convert the sheets and delete the paragraphs which obviously deal with subjects not available in Prime anymore. Those sheets have to be rewritten if they should make any sense (unless of course if the intended sense is to be able to show how much content is already available for Prime). In doing so you should also highlight the subjects which Prime can do better than older versions of Mathcad (yes, there are a few). As an example in one of the graphing tutorials I found a long winding paragraph how to get Mathcad (sorry, Prime) to plot a graph showing feets instead of the SI units meters. This is far easier in Prime now and the "converted" sheet should reflect that, I think.
And please reread the sheets before posting - a lot of them has horrible page breaks. Especially those inside of a text region are inferiour! Personally I consider the handling of page break a severe Prime bug, but its there and if you publish you have to deal with it (adding hard page breaks, adding lines in a text region, etc.)