I have two matrices, and I want Maple to test and see whether they are different to each other (as part of a for to while loop -i.e. it will keep looping until the matrices are the same). However, even when they are identical, it returns a value of true to evalb(A <> B). What can I do?

When I try to run this particular programme, it pops up and tells me "Clarify Expression" - "Parts of the expression are ambiguous. Please select one of the suggested meanings." However, before the suggested meanings it quotes the line of programming that this happened on. When I made the programme, I did it line by line, so I know what the suggested options are, and which one I want. However, now the line of programming is such a big block of text that the window goes completely off screen. There's no way to resize it, and I can't move it high enough to see the options. What can I do?