Question 48885
  
  {{{(16x^2-100)/(12x+30)(4x^2-10x)}}} = {{{((4x+10)(4x-10))/(3(4x+10)*x(4x-10)))}}} = {{{(cross((4x+10))cross((4x-10)))/(3cross((4x+10))*x*cross((4x-10))))}}}  =  {{{1/3x}}} Answer.