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Expression 4: 1 half StartRoot, negative 4 "x" squared plus 20 "x" minus 21 , EndRoot minus 1 left brace, StartFraction, 103 Over 58 , EndFraction less than or equal to "x" , right brace

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Expression 5: StartFraction, 21 Over 20 , EndFraction "x" minus StartFraction, 87 Over 40 , EndFraction left brace, StartFraction, 63 Over 58 , EndFraction less than or equal to "x" less than or equal to StartFraction, 103 Over 58 , EndFraction , right brace

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Expression 6: "x" equals 7 halves left brace, negative 3 halves less than or equal to "y" less than or equal to negative 1 , right brace

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Expression 7: 3 halves left brace, 0 less than or equal to "x" less than or equal to 17 halves , right brace

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