Expression 12: "e" Superscript, left parenthesis, StartFraction, ln left parenthesis, "x" , right parenthesis minus ln left parenthesis, "d" minus "x" , right parenthesis plus "c" ln left parenthesis, "b" , right parenthesis Over "c" , EndFraction , right parenthesis , Baselineelnx−lnd−x+clnbc
12
Expression 13: "b" left parenthesis, StartFraction, "x" Over "d" minus "x" , EndFraction , right parenthesis Superscript, 5 ninths , Baselinebxd−x59