b^-6/b^-3
To simplify this expression, we can use the rule of dividing exponents.
b^-6/b^-3 = b^(-6-(-3))
= b^(-6+3)
= b^-3
Therefore, b^-6/b^-3 simplifies to b^-3.
b^-6/b^-3 = b^(-6-(-3))
= b^(-6+3)
= b^-3
Therefore, b^-6/b^-3 simplifies to b^-3.