Expression 14: polygon left parenthesis, left parenthesis, negative 20 , 27 , right parenthesis , left parenthesis, negative 15 , 27 , right parenthesis , left parenthesis, negative 15 , 28 , right parenthesis , left parenthesis, negative 20 , 28 , right parenthesis , right parenthesispolygon−20,27,−15,27,−15,28,−20,28