Expression 1: StartRoot, StartAbsoluteValue, "x" plus 6 times StartRoot, StartAbsoluteValue, "x" minus 9 , EndAbsoluteValue , EndRoot , EndAbsoluteValue , EndRoot plus StartRoot, StartAbsoluteValue, "x" minus 6 StartRoot, StartAbsoluteValue, "x" minus 9 , EndAbsoluteValue , EndRoot , EndAbsoluteValue , EndRootx+6·x−9+x−6x−9