#4220 - fixed by adding brackets to the expression

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35298 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
[cas] - #4085 - fixed

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35299 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Fix for poly:x^2

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35300 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e