Rút gọn các biểu thức sau: 3/2x (x^2 - 2/3 x + 2) - 5/3 x^2 (x + 6/5)

\[\frac{3}{2}x\left( {{x^2} - \frac{2}{3}x + 2} \right) - \frac{5}{3}{x^2}\left( {x + \frac{6}{5}} \right)\]

= \[\frac{3}{2}\]x³ - x² + 3x \[ - \frac{5}{3}\]x³ - 2x²

= \[\left( {\frac{3}{2}{x^3} - \frac{5}{3}{x^3}} \right)\] - (x² + 2x²) + 3x

= \[\frac{{ - 1}}{6}\]x³ - 3x² + 3x.