運算式 12: "y" equals 1.8 left brace, negative 1.2 less than or equal to "x" less than or equal to negative .6 , right bracey=1.8−1.2≤x≤−.6
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運算式 13: "x" equals .6 left brace, 1.2 less than or equal to "y" less than or equal to 1.8 , right bracex=.61.2≤y≤1.8
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運算式 14: "x" equals 1.2 left brace, 1.2 less than or equal to "y" less than or equal to 1.8 , right bracex=1.21.2≤y≤1.8
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運算式 15: "y" equals 1.8 left brace, .6 less than or equal to "x" less than or equal to 1.2 , right bracey=1.8.6≤x≤1.2
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運算式 16: "y" equals 1.2 left brace, .6 less than or equal to "x" less than or equal to 1.2 , right bracey=1.2.6≤x≤1.2
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運算式 17: "y" equals negative "x" plus .6 left brace, 1.2 less than or equal to "y" less than or equal to 1.8 , right bracey=−x+.61.2≤y≤1.8
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運算式 18: "y" equals "x" plus .6 left brace, 1.2 less than or equal to "y" less than or equal to 1.8 , right bracey=x+.61.2≤y≤1.8
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運算式 19: "y" equals "x" plus 2.4 left brace, 1.2 less than or equal to "y" less than or equal to 1.8 , right bracey=x+2.41.2≤y≤1.8
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運算式 20: "y" equals negative "x" plus 2.4 left brace, 1.2 less than or equal to "y" less than or equal to 1.8 , right bracey=−x+2.41.2≤y≤1.8
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運算式 21: "x" equals 0.5 left brace, negative 2 less than or equal to "y" less than or equal to negative 0.5 , right bracex=0.5−2≤y≤−0.5
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運算式 22: "x" equals 1.5 left brace, negative 2 less than or equal to "y" less than or equal to negative .5 , right bracex=1.5−2≤y≤−.5
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運算式 23: "y" less than or equal to "x" plus 4 left brace, 2 less than or equal to "y" less than or equal to 4 , right brace left brace, 2 less than or equal to "y" less than or equal to 4 , right brace left brace, negative 2 less than or equal to "x" less than or equal to 0 , right bracey≤x+42≤y≤42≤y≤4−2≤x≤0
