Expression 7: "y" greater than "x" squared plus 2 left brace, "y" less than 4 , right bracey>x2+2y<4
7
Expression 8: 0 less than or equal to "y" less than or equal to 2 "x" minus 4 left brace, "x" less than 4 , right brace0≤y≤2x−4x<4
8
Expression 9: negative "x" less than or equal to "y" less than or equal to "x" plus 7 left brace, negative 15 less than "x" less than negative 2 , right brace−x≤y≤x+7−15<x<−2
9
Expression 10: "y" minus 11 less than "x" less than negative "y" minus 1 left brace, "y" greater than or equal to 3 , right bracey−11<x<−y−1y≥3