Calculating Annualized Return on Equity - Microsoft Community

i'm trying calculate , annualized 3 year return on equity.

                       2012            2013            2014                 annualized 3 year return

roe                 -169%          268%            15.8%                             ?

in order take compouding effect , calculate annual return assuming has raised power of 3.  is there excel formula calculate annual return on 3 years

thanks

Office / Excel / Windows 10 / Office 2010