Esegui la seguente espressione
$$\left( \dfrac{3}{2}x^{2}-\dfrac{5}{4}x^{2}y\right) \left( \dfrac{3}{2}x^{2}-\dfrac{2}{3}x^{3}+\dfrac{5}{4}x^{2}y\right) -\left( \dfrac{5}{4}x^{2}y+\dfrac{3}{2}x^{2}\right) \left( \dfrac{3}{2}x^{2}-\dfrac{5}{4}x^{2}y-\dfrac{2}{3}x^{3}\right)=$$
$$\dfrac{9}{4}x^{4}-x^{5}+\dfrac{15}{8}x^{4}y-\dfrac{15}{8}x^{4}y+\dfrac{5}{6}x^{5}y-\dfrac{25}{16}x^{4}y^{2}-\dfrac{15}{8}x^{4}y+\dfrac{25}{16}x^{4}y^{2}+\dfrac{5}{6}x^{5}y-\dfrac{9}{4}x^{4}+\dfrac{15}{8}x^{4}y+x^{5}=$$
$$\dfrac{5}{3}x^{5}y$$