(2x+5)(x 2 −4x−1)

It seems like you want to expand the expression "(2x+5)(x^2 -4x -1)". Here are the steps:

Step 1: Distribute the terms in the first parentheses to each term in the second parentheses.

= 2x * (x^2 - 4x - 1) + 5 * (x^2 - 4x - 1)

Step 2: Multiply each term.

= 2x^3 - 8x^2 - 2x + 5x^2 - 20x - 5

Step 3: Combine like terms.

= 2x^3 - 3x^2 - 22x - 5

So, the expanded form of the expression "(2x+5)(x^2 -4x -1)" is "2x^3 - 3x^2 - 22x - 5".