\[\left( \frac{3}{5} \right)^{2} \cdot 1\frac{2}{3} + (0,6)^{2} =\]
\[= \frac{3^{2}}{5^{2}} \cdot \frac{5}{3} + 0,36 = \ \frac{3^{2 - 1}}{5^{2 - 1}} + 0,36 =\]
\[= \frac{3}{5} + 0,36 = 0,6 + 0,36 = 0,42.\]