\[\left( 2x^{2} - x \right)\left( 8x^{2} - 2x \right) =\]
\[= 16x^{4} - 4x^{3} - 8x^{3} + 2x^{2} =\]
\[= 16x^{4} - 12x^{3} + 2x^{2}\]