Question 631383
Follow the general rule:
{{{ a^(-b) = 1 / a^b }}}
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{{{ ( r^6*s )^(-2) / ( r^(-5)*s^3 ) }}}
{{{ 1 / (( r^6*s )^2 * r^(-5)*s^3 )  }}}
{{{ 1 /( r^12 * s^2 * r^(-5) * s^3 ) }}}
Rearrange factors
{{{ 1 / ( r^12 * r^(-5) * s^2 * s^3 ) }}}
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Now use the rule:
{{{ a^(-b) * a^c = a^( c - b ) }}}
{{{ 1 / ( r^7 * s^5) }}} answer