Question 1069699
<pre>
{{{cross(9^9^9)}}} is incorrect mathematical notation because 
exponentiation is not associative, and there is no rule
in the order of operations that states which exponentiation we
are to do first.  Therefore we must use parentheses to indicate
which is meant.  We must either write this:

{{{(9^9)^9}}}{{{""=""}}}{{{196627050475552913618075908526912116283103450944214766927315415537966391196809}}} 

or this:

{{{matrix(2,1,"",9^((9^9)))}}} 

However the second one is so large that it would take 369693100 digits
to write it.

Edwin</pre>