Expression 4: "c" left parenthesis, "k" , right parenthesis equals StartFraction, "w" left parenthesis, "k" , right parenthesis Over "k" , EndFractionck=wkk
4
Expression 5: "c" Subscript, "g" , Baseline left parenthesis, "k" , right parenthesis equals StartFraction, "d" Over "d" "k" , EndFraction "w" left parenthesis, "k" , right parenthesiscgk=ddkwk