Sorry about the mixup on the pasted image, I thought that I was pasting the commands from the worksheet.
Your reviewed copy is exactly my point. The result you get is what I get using Maple 18. The result I show (0=0) is the result I get using Maple 2015. The same file gives different results. The Maple 18 result is the correct result. I have tried uninstalling and reinstalling Maple 2015 and Maple 18, but the result is the same.
I am using Maple 2015.0 for the Macintosh. Could the Macintosh version be doing something wierd. I am running on Mac OSX 10.10.2
I am at a loss. My guess is something happened durinhg the installation. Everything else seems to be loaded and working with Maple 2015.