Expression 1: "y" equals left brace, "x" less than 0.5 : negative log left parenthesis, "x" , right parenthesis , right bracey=x<0.5:−logx
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Expression 2: "y" equals left brace, "x" greater than 0.5 : negative log left parenthesis, 1 minus "x" , right parenthesis , right bracey=x>0.5:−log1−x