Expression 2: "y" equals "z" left parenthesis, "x" minus 2 , right parenthesis left parenthesis, StartFraction, "x" Over 2 , EndFraction minus 2 , right parenthesis Superscript, 2 , Baseline plus "z" left parenthesis, 2 minus "x" , right parenthesis "x"y=zx−2x2−22+z2−xx
2
Expression 3: "y" equals "z" left parenthesis, negative 2 minus "x" , right parenthesis sine "x" plus "z" left parenthesis, "x" plus 2 , right parenthesis "z" left parenthesis, 2 minus "x" , right parenthesis "x" squared plus "z" left parenthesis, "x" minus 4 , right parenthesis left parenthesis, "x" minus 2 , right parenthesisy=z−2−xsinx+zx+2z2−xx2+zx−4x−2