Question 45480
{{{(5x^2 - 2x - 1)(x^2 + 4x - 4)}}}
{{{5x^4 - 2x^3 - x^2 + 20x^3 - 8x^2 - 4x - 20x^2 + 8x + 4}}}
{{{5x^4 + 18x^3 - 29x^2 + 4x + 4}}}