表达式14: "x" equals negative 5 left brace, 2 less than or equal to "y" less than or equal to 7 , right bracex=−52≤y≤7
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表达式15: "x" equals 5 left brace, 2 less than or equal to "y" less than or equal to 7 , right bracex=52≤y≤7
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表达式16: "x" equals 5 left brace, 2 less than or equal to "y" less than or equal to 7 , right bracex=52≤y≤7
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表达式17: "x" equals 5 left brace, 2 less than or equal to "y" less than or equal to 7 , right bracex=52≤y≤7
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表达式18: "x" equals 5 left brace, 2 less than or equal to "y" less than or equal to 7 , right bracex=52≤y≤7
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表达式19: left parenthesis, StartFraction, 4 "x" Over 5 , EndFraction , right parenthesis squared plus left parenthesis, "y" minus 7 , right parenthesis squared less than or equal to left parenthesis, 4 , right parenthesis squared left brace, 7 less than or equal to "y" , right brace4x52+y−72≤427≤y
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表达式20: left parenthesis, StartFraction, 4 "x" Over 5 , EndFraction , right parenthesis squared plus left parenthesis, "y" minus 7 , right parenthesis squared less than or equal to left parenthesis, 4 , right parenthesis squared left brace, 7 less than or equal to "y" , right brace4x52+y−72≤427≤y
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表达式21: left parenthesis, StartFraction, 4 "x" Over 5 , EndFraction , right parenthesis squared plus left parenthesis, "y" minus 7 , right parenthesis squared less than or equal to left parenthesis, 4 , right parenthesis squared left brace, 7 less than or equal to "y" , right brace4x52+y−72≤427≤y
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表达式22: left parenthesis, StartFraction, 4 "x" Over 5 , EndFraction , right parenthesis squared plus left parenthesis, "y" minus 7 , right parenthesis squared less than or equal to left parenthesis, 4 , right parenthesis squared left brace, 7 less than or equal to "y" , right brace4x52+y−72≤427≤y
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表达式23: "c" Subscript, 1 , Baseline equals rgb left parenthesis, "k" , "l" , "m" , right parenthesisc1=rgbk,l,m
