Incorrect. Remember that $\displaystyle{{7}}^{{x}}{{7}}^{{y}}={{7}}^{{{x}+{y}}}\usepackage{cmbright}\Huge\$ and $\displaystyle{{\left({{7}}^{{a}}\right)}}^{{b}}={{7}}^{{{a}{b}}}\usepackage{cmbright}\Huge\$ . Since $\displaystyle{49}={{7}}^{{2}}\usepackage{cmbright}\Huge\$ you can rewrite $\displaystyle{{\left({{7}}^{{-{{6}}}}{{\left({49}\right)}}^{{8}}\right)}}^{{2}}\usepackage{cmbright}\Huge\$ as $\displaystyle{{\left({{7}}^{{-{{6}}}}{{\left({{7}}^{{2}}\right)}}^{{8}}\right)}}^{{2}}\usepackage{cmbright}\Huge\$ and then simplify the expression.