Idon’t know what to do with the -8 and 12

the simplified expression is

2y^15/(3x^5z^12)

Step-by-step explanation:

The given expression is

(-8x^2y^8z^-5) / (12^4y^-7z^7)

To simplify the given expression, we would apply one of the rules of indices. It is expressed as follows

x^a ÷ x^b = x^(a - b)

Applying the above rule of indices, the expression becomes

(-8/12 × x^(2 - 7) × y^(8 - - 7) × z^ (- 5 - 7)

= - 2/3 × x^- 5 × y^15 × z^-12

= - 2/3x^- 5y^15z^-12

= 2y^15/(3x^5z^12)

answer: do you still need this?