Expression 3: "y" equals StartFraction, "f" left parenthesis, "x" minus "t" , right parenthesis Over 2 , EndFraction plus StartFraction, "f" left parenthesis, "x" plus "t" , right parenthesis Over 2 , EndFractiony=fx−t2+fx+t2
3
Expression 4: "y" equals StartFraction, "f" left parenthesis, "x" minus "t" , right parenthesis Over 2 , EndFraction minus 1y=fx−t2−1
4
Expression 5: "y" equals StartFraction, "f" left parenthesis, "x" plus "t" , right parenthesis Over 2 , EndFraction plus 1y=fx+t2+1