def METHOD_NAME():
    M = Matrix([x, 1]).as_immutable()
    assert M.integrate(x) == Matrix([x**2/2, x])
    assert M.diff(x) == Matrix([1, 0])
    assert M.limit(x, 1) == Matrix([1, 1])
    assert zeros(2).as_immutable().integrate(x) == zeros(2)