Frankly, I don't understand MathLover1's answer! I do understand that MathLover1 changed the problem slightly. (x^m)^(x^m)^(x^m) is ambiguous. It could be either [(x^m)^(x^m)]^(x^m), which is what MathLover1 changed it to, or it could be (x^m)^[(x^m)^(x^m)], which is much more difficult.
For example, 2^3^2 is ambiguous. It could be (2^3)^2= 8^2= 64[ or it could be 2^{3^2}= 2^9= 1024.
(x^a)^b= x^{ab} so (x^m)^(x^m)= x^{mx^m} and
[(x^m)^(x^m)]^(x^m)= (x^{mx^m})^{x^m}= x^{m(x^m)(x^m)}= x^{mx^{2m}}.
To differentiate that, let \(u= mx^{2m}\) and we have \(x^u\).
Since u is a function of x, we need to use "logarithmic differentiation". Let \(y= x^u\). Then \(ln(y)= ln(x^u)= u ln(x)\). The derivative of \(ln(y)\) with respect to x is \(\frac{1}{y}\frac{dy}{dx}\).
On the right, use the product rule. \(\frac{duln(x)}{dx}= \frac{du}{dx}ln(x)+ u\frac{dln(x)}{dx}\).
Since \(u= mx^{2m}\), \(\frac{du}{dx}= 2m^2x^{2m- 1}\). Of course \(\frac{dln(x)}{dx}= \frac{1}{x}\). So \(\frac{duln(x)}{dx}= 2m^2x^{2m- 1}ln(x)+ mx^{2m}/x= x^{2m-1}(2m^2ln(x)+ m)\).
So we have \(\frac{1}{y}\frac{dy}{dx}= x^{2m-1}(2m^2ln(x)+ m\).
Since \(y= x^u= x^{mx^{2m}}\)
\(\fra{dy}{dx}= x^{mx^{2m}+ 2m- 1}(2m^2ln(x)+ m))\).