Question

$frac{a^3+8}{a^3-4a}* frac{7a-14}{a^2-2a+4}+ frac{a}{7}$

Answer 1

$frac{(a+2)*( a^{2}-2a+4) }{a( a-2)(a+2) }* frac{7(a-2)}{( a^{2}-2a+4) }+ frac{a}{7}= frac{7}{a}+ frac{a}{7} = frac{49+ a^{2} }{7a}$