kill(all)$

van=facebook.com/LearningCalculus;

f(x,y):=''(radcan(fullratsimp(4*x*sqrt(y+1)+8*x - (4*x^2-4*x-3)*sqrt(x+1))));
g(x,y):=''(radcan(fullratsimp(x/(x+1)+x^2 - (y+2)*sqrt((x+1)*(y+1)))));

is(equal(f(3,5/4),g(3,5/4)));