ESPRESSIONI CON PRODOTTI NOTEVOLI

${(4 xy - y)}^{3} - {(xy - 4 y)}^{3} - 9 y^{3} (x^{2} (7 x - 4) - (4 x - 7))$ (R)
$\frac{1}{16} (\frac{4}{3} x - 1) (\frac{4}{3} x + 1) (\frac{16}{9} x^{2} + 1) +0.5 (\frac{4}{9} x^{2} + 0.25) - {(\frac{4}{9} x^{2} + 0.25)}^{2}$ (R)
${(x + 2)}^{2} - 3 \cdot (x + 2) \cdot (x - 2) + {(x - 2)}^{3} - x^{2} \cdot (x - 8) - 4 \cdot (4 x + 2)$ (R)
${- (0.2 x y^{2} + 1.5)}^{2} - {(\frac{2}{3} x - 0.5 y)}^{3} - ({(0.5 y - \frac{x}{3})}^{3} - (0.2 x y^{2} + 1.5) \cdot (0.2 x y^{2} - 1.5)) - x (\frac{- 17}{20} y^{2} - \frac{7}{27} x^{2}) - 0.5 x^{2} y$ (R)
${(x - 2 y)}^{3} {(x + 2 y)}^{3} + {(x^{3} + 8 y^{3})}^{2} - 4 x^{2} y^{2} (- 3 x^{2} + 12 y^{2} + 4 xy)$ (R)
${(0.2 x + \frac{2}{5} y)}^{3} - (0.2 x + \frac{2}{5} y) (\frac{x^{2}}{25} + \frac{4}{25} y^{2} - \frac{2 xy}{25}) - 0.08 (x (\frac{3 xy}{5} + y) + 3 y (\frac{2 xy}{5} - \frac{x}{3}))$ (R)
${(x^{2} - 3 xy + y^{2})}^{2} - (x^{2} - y^{2}) \cdot (x^{2} + y^{2}) - 11 x^{2} y^{2} + 6 xy (x^{2} + y^{2}) - 2 y^{4}$ (R)
${((x^{0.25} - 1) (x^{0.25} + 1) (x + 1) + 2)}^{2} - x (x - 1) ({(x - 1)}^{2} + 3 x) - (2 x - 1) (x + 1)$ (R)