Answer:
[tex]-\frac{1}{7776}[/tex]
Step-by-step explanation:
Put negative exponents in the denominator to make them positive.
[tex]\frac{1}{-6^5}[/tex]
[tex]\frac{1}{-6*-6*-6*-6*-6}[/tex]
[tex]\frac{1}{-7776}[/tex]