Question 320328
{{{((7b^4)/(8r^4))*((64r^7)/(49b))=(7/8)(64/49)b^(4-1)r^(-4+7)}}}
{{{((7b^4)/(8r^4))*((64r^7)/(49b))=(8/7)b^(3)r^(3)}}}
{{{((7b^4)/(8r^4))*((64r^7)/(49b))=(8/7)(br)^3}}}