kill(all);

van=facebook.com/LearningCalculus$

f(x,y,z):=x/(y+z)+y/(x+z)+ z/(x+y);

a:11$

for x:-a thru a do
    for y:-a thru a do
        for z:-a thru a do
            if(not(equal((y+z),0)) and
               not(equal((x+z),0)) and
               not(equal((x+y),0)) and
                   equal(f(x,y,z),4)) then
                print("Answer ", x, y, z)$