kill(all)$

van=facebook.com/LearningCalculus$

f(a,b):=a/b=1/2/3/4/4/6/7/8;

f(a,b);

f(x,y);

first(solve(f(x,y),y));

sqrt(2);

g(a,b):=a/b=c/d/e/f/g/h/i;

g(a,b);