What is (4x 7y-5) (-7x-2y 1) simplified?

To simplify the expression ((4x \cdot 7y - 5)(-7x - 2y + 1)), first distribute each term in the first expression to each term in the second expression. This results in multiple products: (4x \cdot (-7x)), (4x \cdot (-2y)), (4x \cdot 1), (-5 \cdot (-7x)), (-5 \cdot (-2y)), and (-5 \cdot 1). After performing the multiplication and combining like terms, the simplified expression is (-28x^2 - 8xy + 4x + 35x + 10y - 5), which can be further simplified to (-28x^2 + 27x + 10y - 5).