Expression 5: "b" "x" plus left parenthesis, 1 minus "b" , right parenthesis "y" equals "l" left brace, "x" greater than or equal to 0 , right brace left brace, "y" greater than or equal to 0 , right bracebx+1−by=lx≥0y≥0
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Expression 6: "b" equals 0.5b=0.5
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Expression 7: StartFraction, left parenthesis, "x" Superscript, "a" , Baseline "y" Superscript, 1 minus "a" , Baseline , right parenthesis squared Over left parenthesis, "b" "x" plus left parenthesis, 1 minus "b" , right parenthesis "y" , right parenthesis , EndFraction equals "l" left brace, "x" greater than or equal to 0 , right brace left brace, "y" greater than or equal to 0 , right bracexay1−a2bx+1−by=lx≥0y≥0
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Expression 8: "y" equals "x" left brace, "x" greater than or equal to 0 , right brace left brace, "y" greater than or equal to 0 , right bracey=xx≥0y≥0
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Expression 9: StartRoot, "x" squared plus "y" squared , EndRoot equals StartRoot, 2 , EndRoot "l" left brace, "x" greater than or equal to 0 , right brace left brace, "y" greater than or equal to 0 , right bracex2+y2=2lx≥0y≥0