Compute Engine issues with rational expressions

[fredekr]

There seems to be some problems with simple rational expressions that have sums/differences in the numerator or denominator. Interestingly, our use involves numerical substitution, which also fails.

Below are some screenshots from our use, and below that are some tests I did on the demo page. I suspect if the demo page starts to work properly, then our use will work too.

Our examples (these should all be equivalent to the expected answer):

Examples from demo page (these should all simplify/evaluate to zero): Success:

Success:

Fail:

[fredekr]

Oops, wrong project -- recreated issue in Computer Engine repository.