Expression 2: StartRoot, ( "x" minus 4 ) squared plus "y" squared , EndRoot minus StartRoot, ( "x" plus 4 ) squared plus "y" squared , EndRoot equals 4(x−4)2+y2−(x+4)2+y2=4
2
Expression 3: "x" Superscript, 2 , Baseline plus "y" Superscript, 2 , Baseline equals 16x2+y2=16