Rational or integer coefficients with simplify?

[jo-ap]

In some cases simplify returns numeric coefficients as floats. I noticed that it happens e.g. when the top level operation is + , but not if it is /. Here is an example:

using Symbolics
@variables a b x y
simplify( (y-x)*b//a + (y*b - x*b)//a )   # (-2.0b*x + 2.0b*y) / a
simplify( ((y-x)*b + (y*b - x*b))//a )    # (-2b*x + 2b*y) / a

Is there a way to force simplify to return all numeric values as integers or rationals?

[Herman Sletmoen]

I seem to have duplicated a very similar issue in #1083.

[Christopher Rackauckas]

Indeed, closing as a duplicate.