NEED HELP ASAP FOR HOMEWORK!! IF RIGHT WILL MARK BRAINLIEST!!!

Answer:
It's the 3rd one using the formula [tex]a^{-m} = \frac{1}{a^{m} }[/tex]
Once you follow that step you need to multiply the exponent of 3 and 6 with the exponent outside the parenthesis..... which is why it's the 3rd one.
Answer:
I think its C
Step-by-step explanation:
([tex]3^{3}\\[/tex]x[tex]6^{6}[/tex])[tex]^{-3}[/tex]=
[tex]\frac{1}{1^{3}x6^{6} ^{3} }[/tex]