Question 739466
Are you asking this?   
{{{(32/b^4)(3b^2)}}}?


The {{{b^2/b^2}}} is the same as 1, so this cancels in order to simplify.


{{{(32/(b^2*b^2))(3*b^2)=(32*3/(b^2))(b^2/b^2)}}}
={{{32*3/b^2}}}
={{{highlight(96/b^2)}}}.