While this can give a notation for the domain, you'd still need an engine to process it. Prolong+CLPFD perhaps meets it well (not too familiar with the tax doma

While this can give a notation for the domain, you'd still need an engine to process it. Prolong+CLPFD perhaps meets it well (not too familiar with the tax domain) and one could perhaps paraphrase Greenspun's tenth rule to this combo too.