$$\left({\mathtt{7.1}}{\mathtt{\,\times\,}}{{\mathtt{10}}}^{-{\mathtt{5}}}\right){\mathtt{\,-\,}}\left({\mathtt{6.7}}{\mathtt{\,\times\,}}{{\mathtt{10}}}^{-{\mathtt{6}}}\right) = {\mathtt{0.000\: \!064\: \!3}}$$
how do i do an exponent on this calculator?
