Question

$frac{7}{ab} - frac{3a+6}{a} * frac{5}{a+2} =$

Answer 1

$dfrac{7}{ab} - dfrac{3a+6}{a} cdot dfrac{5}{a+2} = dfrac{7}{ab} - dfrac{3(a+2)}{a} cdot dfrac{5}{a+2}=dfrac{7}{ab}-dfrac{15}{a}=dfrac{7-15b}{ab}$