Basic arithmetic evaluations are reimplemented in a context-independe…

…nt way.

CHANGES.rst

@@ -76,7 +76,9 @@ Internals
 #. ``_SetOperator.assign_elementary`` was renamed as ``_SetOperator.assign``. All the special cases are not handled by the ``_SetOperator.special_cases`` dict.
 #. ``isort`` run over all Python files. More type annotations and docstrings on functions added.
 #. caching on immutable atoms like, ``String``, ``Integer``, ``Real``, etc. was improved; the ``__hash__()`` function was sped up. There is a small speedup overall from this at the expense of increased memory.
-#. more type annotations added to functions, especially builtin functions
+#. more type annotations added to functions, especially builtin functions.
+#. Improved implementation for ``Accuracy`` and ``Precision``.
+#. Improved implementation for ``Plus``, ``Times`` and ``Power``, ``Exp``, ``Abs`` and ``Sign`` for numerical elements. Also, the new versions improves the compatibility with WMA in the results of arithmetic symbolic evaluation.
 
 
 Bugs
@@ -93,6 +95,8 @@ Bugs
 #. Units and Quantities were sometimes failing. Also they were omitted from documentation.
 #. Better handling of ``Infinite`` quantities.
 #. Fix ``Precision`` compatibility with WMA.
+#. Prevent that `DirectedInfinity[dir]` be transformed into a `ComplexInfinity`. Rules for `Infinity`, `ComplexInfinity` and `DirectedInfinity wre improved`.
+
 
 
 PyPI Package requirements