\[3\frac{3}{8} \cdot 3\frac{1}{5} + 3\frac{1}{5} \cdot 1\frac{5}{12} - 4\frac{1}{6} \cdot 3\frac{1}{5} =\]
\[= 3\frac{1}{5} \cdot \left( 3\frac{3 \cdot 3}{24} + 1\frac{5 \cdot 2}{24} - 4\frac{1 \cdot 4}{24} \right) =\]
\[= 3\frac{1}{5} \cdot \left( 3\frac{9}{24} + 1\frac{10}{24} - 4\frac{4}{24} \right) = 3\frac{1}{5} \cdot \frac{15}{24} =\]
\[= \frac{16 \cdot 15}{5 \cdot 24} = \frac{2 \cdot 3}{1 \cdot 3} = 2.\ \]