Is this identity true? Wolfram|Alpha thinks is not.
That's how I demonstrated it:
taking the logarithm of both sides we obtain $\ln(x^3)\ln(x)=3\ln(x)^2$ and the right hand side is $3\ln(x)^2\ln(e)=3\ln(x)^2$ thus the equation $x^{\ln(x^3)}=e^{3\ln(x)^2}$ is true for $x>0$.
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taking the logarithm of both sides we obtain $\ln(x^3)\ln(x)=3\ln(x)^2$ and the right hand side is $3\ln(x)^2\ln(e)=3\ln(x)^2$ thus the equation $x^{\ln(x^3)}=e^{3\ln(x)^2}$ is true for $x>0$.