Question 152392
Use the following properties of exponents:
{{{a^m/a^n=a^(m-n)}}}

{{{(-2r)^4/(-2r)^-2)}}}
={{{(-2r)^(4-(-2))}}}
={{{(-2r)^6}}}
={{{((-2)r)^6}}}
={{{(-2)^6r^6}}}
={{{64r^6}}}