kill(all)$

van=facebook.com/LearningCalculus$

f(x):= (1+log(x)^2)^(1/3) - 1;

g(x):= 1+cos(%pi*x);

h(x):=''(f(x)/g(x));

limit(diff(f(x),x,2),x,1)/limit(diff(g(x),x,2),x,1);