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Simple example of a finitely presented algebra

How can I work with the finitely presented F2-algebra

F2a,b:ba=a2b

in SageMath? In my previous question it became clear that SageMath quotients do not really work well unless we use implementation="letterplace" and homogeneous ideals. This is a bug, and it has been reported several times in this forum. So we would require a new variable s and take sba=a2b as the relation (also, s should commute with a and b). The problem, however, is that SageMath will not simplify terms according to the relation. So in more complex expression, sba will just stay as it is.

I then tried with Singulars Galgebras, but again this does not work since the relation ba=a2b is not homogeneous, and I get other error messages when I try to make it homogeneous instead.