Expression 4: "x" Subscript, "e" , Baseline equals StartFraction, 2 Over "k" , EndFractionxe=2k
4
Expression 5: "o" Subscript, "e" , Baseline left parenthesis, "x" , right parenthesis equals 1 half "x" "e" to the negative 2nd poweroex=12xe−2
5
Expression 6: left parenthesis, "x" Subscript, "e" , Baseline , "f" left parenthesis, "x" Subscript, "e" , Baseline , right parenthesis , right parenthesisxe,fxe
6
Expression 7: left parenthesis, 0 , "k" , right parenthesis0,k