Question

3^-3 x 3^6 x 3^6

Answer 1

Add the exponents again. 'Nuff said again ;)

Answer 2

\(\Large \color{MidnightBlue}{\Rightarrow 3^{-3 + 6 + 6} }\)
\(\Large \color{MidnightBlue}{\Rightarrow 3^{9} }\)

Answer 3

Thankss (;