Expression 1: "f" left parenthesis, "x" , right parenthesis equals StartAbsoluteValue, "x" plus 1 , EndAbsoluteValue minus StartAbsoluteValue, "x" , EndAbsoluteValue plus StartAbsoluteValue, "x" minus 1 , EndAbsoluteValue minus 2 Has graph. To audio trace, press ALT+T.fx=x+1−x+x−1−2