A=2/3+4/21+5/84+6/216+9/486+12/1053

A = `2/3` + `4/21` + `5/84` + `6/216` + `9/486` + `12/1053`

$\text{= $\dfrac{2}{3}$ $\text{+}$ $\dfrac{4}{21}$ $\text{+}$ }$$\dfrac{5}{84}$ $\text{+}$ `6/216` $\text{+}$ `9/486` + `12/1053` = `38/39`