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

$(a-b)(a-b) = $

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

$(2x+1)(2x+1) = $

$(2a+3b)(2a+3b) = $

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

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

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

$(2a-2b)(2a+2b) = $

$(1-2y)(1+2y) = $