some CAS styling

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25939 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
problem serializing {{}} [needs ggb42 backport]

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25940 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
unused imports removed, temporary fix for ggt view

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25941 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
More instanceof changes

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25942 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
typo in test SimplificationOfEquations_SeveralVariables_1

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25943 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e