3 2 2 3 2 2 m *n + 2*m *n - m *n
m^3*n^2 + (2*m^2)*n^3 - m^2*n^2
2 2 m *n *(-1 + m + 2*n)
m^2*n^2*(-1 + m + 2*n)
m*(m + -1 + 2*n)*n
(m*(m - 1 + 2*n))*n
3 2 2 2 2 3 m *n - m *n + 2*m *n
m^3*n^2 - m^2*n^2 + 2*m^2*n^3
2 / 3 2\ 2 3 n *\m - m / + 2*m *n
2 / 2 3\ 3 2 m *\- n + 2*n / + m *n
m^2*(-n^2 + 2*n^3) + m^3*n^2
m^3*n^2 - m^2*n^2 + 2.0*m^2*n^3