Expression 2: 0 less than or equal to "y" less than or equal to StartRoot, 1 minus "x" squared , EndRoot left brace, negative 1 less than "x" less than 0 , right brace0≤y≤1−x2−1<x<0
2
Expression 3: StartRoot, 1 minus "x" squared , EndRoot greater than or equal to "y" greater than or equal to StartRoot, 1 half squared minus left parenthesis, "x" minus 1 half , right parenthesis squared , EndRoot left brace, 0 less than or equal to "x" less than or equal to 1 , right brace1−x2≥y≥122−x−1220≤x≤1
3
Expression 4: 0 greater than or equal to "y" greater than or equal to negative StartRoot, 1 half squared minus left parenthesis, "x" plus 1 half , right parenthesis squared , EndRoot left brace, negative 1 less than "x" less than 0 , right brace0≥y≥−122−x+122−1<x<0