code style

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@33569 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
CAS: fix First/Last[x^3 + x y + 3]

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@33570 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e