Question 1209868
<pre>
{{{matrix(8,3,

"","","",
2^(16^x) ,""="", 128*4^x, 

2^((2^4)^x) ,""="", (2^7)*(2^2)^x,

2^(2^(4x)),""="",2^7*2^(2x),

2^(2^(4x)),""="",2^(2x+7),

2^(4x),""="",2x+7,

(2^x)^4,""="",2x+7,

2^x,""="",root(4,2x+7)

)}}}

Edwin</pre>