kill(all)$

van=facebook.com/LearningCalculus$

'(integrate(log(x+3)/sqrt(x+4),x)) = integrate(log(x+3)/sqrt(x+4),x) + C;

'(integrate(log(x)/sqrt(x),x)) = integrate(log(x)/sqrt(x),x) + C;

'(integrate(sqrt(x)/log(x),x)) = integrate(sqrt(x)/log(x),x) + C;

limit(log(x)/sqrt(x),x,inf);

limit(log(x+3)/sqrt(x+4),x,inf);