\( e\,^{1 \over 3} - (e\,^2)^{1\over 3} = e\,^{1 \over 3} - e\,^{2\cdot{1\over 3}} = e\,^{1 \over 3} - e\,^{2\over 3} = \)
\( = \, 1,39561 \, - \, 1,94773 = -0.55212 \)