Question 911949
{{{ ((64b^2-9)/(b^2-1)) /((8b-3)/(b-1)) }}}


{{{(((8b)^2-3^2)/(b^2-1)) /((8b-3)/(b-1))}}}


{{{(((8b-3)(8b+3))/((b-1)(b+1))) /((8b-3)/(b-1))}}}


{{{((cross((8b-3))(8b+3))/(cross((b-1))(b+1)) )/(cross((8b-3)1)/cross((b-1))1)}}}


{{{ (8b+3)/(b+1) }}}