Expresión 12: polygon left parenthesis, "O" , "A" , "A" plus "B" , "B" , right parenthesispolygonO,A,A+B,B
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Expresión 13: polygon left parenthesis, "O" , left parenthesis, 0 , "B" . "y" , right parenthesis , "B" , right parenthesispolygonO,0,B.y,B
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Expresión 14: polygon left parenthesis, "A" , "A" plus "B" , "A" plus left parenthesis, "B" . "x" , 0 , right parenthesis , right parenthesispolygonA,A+B,A+B.x,0
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Expresión 15: polygon left parenthesis, "B" , "A" plus "B" , "B" plus left parenthesis, 0 , "A" . "y" , right parenthesis , right parenthesispolygonB,A+B,B+0,A.y
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Expresión 16: polygon left parenthesis, "O" , "A" , left parenthesis, "A" . "x" , 0 , right parenthesis , right parenthesispolygonO,A,A.x,0
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Expresión 17: polygon left parenthesis, left parenthesis, 0 , "B" . "y" , right parenthesis , "B" , "B" plus left parenthesis, 0 , "A" . "y" , right parenthesis , left parenthesis, 0 , "A" . "y" plus "B" . "y" , right parenthesis , right parenthesispolygon0,B.y,B,B+0,A.y,0,A.y+B.y
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Expresión 18: polygon left parenthesis, left parenthesis, "A" . "x" , 0 , right parenthesis , "A" , "A" plus left parenthesis, "B" . "x" , 0 , right parenthesis , left parenthesis, "A" . "x" plus "B" . "x" , 0 , right parenthesis , right parenthesispolygonA.x,0,A,A+B.x,0,A.x+B.x,0
