Let's express the following expression as a difference of two squares:

$391\times 409$

Let's express the following expressions as a difference of two squares:

$(4x+3y)(2x-3y)$

Let's express the following expressions as a difference of two squares:

$x$

Let's factorize

$225m^2-100n^2$

Let's factorize

$25x^2-\frac{1}{9}{y}^2{z}^2$

Let's factorize

$7a{x}^2+14ax+7a$

Let's factorize

$3x^4-6x^2{a}^2+3a^4$

Let's factorize

$4b^2{c}^2-{(b^2+c^2-a^2)}^2$

Let's factorize

$64a{x}^2-49a{(x-2y)}^2$