Three smaller triangles are inscribed from the three vertices of a larger triangle in such a way that each side of each smaller triangle is \( \frac{2}{5} \) of the side of the adjacent larger triangle. The ratio of the total area of the three smaller triangles to the remaining part of the larger triangle is:
If x + y = 3, xy = 2 and x < y, then find the value of x3 - y3.