(3/10)*x^5 + (3/15)*x^2*y^3 + (1/6)*x^3*y^2 - (1/9)*y^5
(m^3 - 4m + m^2 - 1)*(m^3 + 1)
x^3 - y^3
2x^2 + 3y^2 - 12z^2 - 7xy - 5yz - 5yz
[(1/2)*x^3 - (1/3)*y^3]*[(3/5)*x^2 + (1/3)*y^2]
(1/2)*x^3 - (8/45)*x^2*y + (4/15)*x*y^2
m^6 + m^5 - 4m^4 + m^2 - 4m -1
(x^2 + xy +y^2) * (x - y)
[(1/2)*x^2 - (1/3)*x*y]*[(2/3)*x - (4/5)*y]
(2x - y + 3z)*(x - 3y - 4z)
