Add algebraic identities simplifications
Add algebraic identities simplifications

These kind of expressions are common in array expressions, so this commit
simmplify a lot the intermediate file, and makes easier to validate the
regression tests.

8l/scc,k0gaMSX/scc,k0gaMSX/kcc,k0gaMSX/kcc,k0gaMSX/scc,k0gaMSX/scc,8l/scc,8l/scc