運算式 5: "x" equals 0 left brace, negative 3 less than or equal to "y" less than or equal to 3 , right bracex=0−3≤y≤3
5
運算式 6: "y" equals 0 left brace, negative 2 less than or equal to "x" less than or equal to 2 , right bracey=0−2≤x≤2
6
運算式 7: "y" equals "x" left brace, negative 17 eighths less than or equal to "y" less than or equal to 17 eighths , right bracey=x−178≤y≤178
7
運算式 8: "y" equals negative "x" left brace, negative 17 eighths less than or equal to "y" less than or equal to 17 eighths , right bracey=−x−178≤y≤178
