Prevent expand(product(f(i),i=0..n-1)) from producing (product(f(i),i=0..n))/f(n)
Prevent expand(product(f(i),i=0..n-1)) from producing (product(f(i),i=0..n))/f(n)

zaxtax/hakaru,zachsully/hakaru,zachsully/hakaru,zaxtax/hakaru