Expression 4: negative "h" left parenthesis, "x" , right parenthesis−hx
4
Expression 5: "h" left parenthesis, "x" , right parenthesis less than "y" less than "g" left parenthesis, "x" , right parenthesis left brace, negative 2 less than "x" less than 0 , right bracehx<y<gx−2<x<0
5
Expression 6: "f" left parenthesis, "x" , right parenthesis less than "y" less than "g" left parenthesis, "x" , right parenthesis left brace, 0 less than "x" less than 4 , right bracefx<y<gx0<x<4