Expression 2: 0.5 times left parenthesis, 2 times "x" , right parenthesis Superscript, "g" , Baseline left brace, "x" less than 0.5 , right brace0.5·2·xgx<0.5
2
Expression 3: 1 minus 0.5 times left parenthesis, 2 times left parenthesis, 1 minus "x" , right parenthesis , right parenthesis Superscript, "g" , Baseline left brace, "x" greater than or equal to 0.5 , right brace1−0.5·2·1−xgx≥0.5