Question 4318
The inverse of {{{ln x }}} is {{{e^x}}}, and vice-versa.  Because of this inverse definition, {{{e^(ln x) = x}}} and also {{{ln e^x = x }}}.  


Therefore, in order to "undo" the first "ln", you must raise both sides of the equation as a power of e.  In other words, write 

{{{ln(ln x) = 2}}}
{{{e^ln(ln x) = e^2}}}


So this simplifies to 
{{{ln x = e^2}}}


Now, raise both sides as a power of e again:

{{{ln x = e^2}}}

{{{e^ln x = e^(e^2)}}}


Final answer is {{{ x = e^(e^2)}}}


R^2 from SCC