\[x^{2} \cdot \left( x^{5} - x^{3} + 2x - 1 \right) =\]
\[{x^{2} \cdot x}^{5} - x^{2} \cdot x^{3} + x^{2} \cdot 2x - x^{2} \cdot 1 =\]
\[= x^{7} - x^{5} + 2x^{3} - x^{2}.\]