aaxa^{a^{x}}aax
ax′loga\frac{a^{x^{\prime}}}{\log a}logaax′
aax3\frac{\mathrm{a}^{\mathrm{a}^{\mathrm{x}}}}{3}3aax
aaax(loga)3\frac{a^{a^{a^{x}}}}{(\log a)^{3}}(loga)3aaax
111