Let's find the product by formulas:
`(a - 2) ( a + 2) ( a^2 + 4)`

Let's find the product by formulas: 49 xx 51

Let's find the product by formulas: (xy + pq) (xy - pq)

Let's find the product by formulas: 1511 xx 1489

Let's find the product by formulas: (2x - y + 3z) (2x + y + 3z)

Let's find the product of the following:- 7, 2x

Let's express the following in the product from using formula. (a^2 + b^2) (a^2 - b^2) (a^4 + b^4) (a^8 + b^8)

Let's find the product of the following:- 3ab, 4ac

Let's find the product of the following:- 2a^2b, 3ab^2

Let's find the product of the following:- -3x, 4x

Let's find the product of the following:- 8x^2, 2y^2