Expression 2: left parenthesis, "x" , right parenthesis squared plus left parenthesis, "y" plus "R" minus 4 , right parenthesis squared equals "R" squaredx2+y+R−42=R2
2
Expression 3: 4 minus "R" plus StartRoot, "R" squared minus left parenthesis, "L" minus "x" , right parenthesis squared , EndRoot4−R+R2−L−x2