Here is a piece of sad comedy based on some
Apart behavior. Is there a way to make
Apart do the expected step?
Consider a very simple expression, such as
expression = (a - b + c - d)/(a - b);
If we were to consider how to take this expression
Apart to simplify it, I would argue that the simplest step that would come to mind is to write
1+(c - d)/(a - b)
cancelling the obvious
a-b combination in numerator and denominator.
Now, let's see if Mathematica 11.3 on windows 10 would produce the same result?