$(\frac{2}{3} + \frac{4}{3})^2 = $

$(x + y)(x - y) = $

$(\sqrt{5} + 7)(7 - \sqrt{5}) = $

$(h + 2)(5 + h) = $

$(6 + x)(6 + y) = $

$101^2 = $

$(x + \frac{1}{2})(x^2 + \frac{1}{4})(x - \frac{1}{2}) = $

$(\dots + \dots)^2 = 49x^2 + y^2 + \dots = $

$(x + 2y + 5)(x + 2y - 5) = $

$(x + y)^2 - (x - y)^2 = $

$(-z - x - y)^2 = $

$(2a - 3x + y)^2 = $