(x-5)(x+5)
(6-y)(6+y)
(a-7)(a+7)
(1-c)(1+c)
(m-4)(m+4)
(n-2)(n+2)
(x-9)(9+×)
(11-d)(d +11)
(4+b)(b-4)
(a+12)(12-a)
(c-3)(3+c)
(8-b)(b+8)
(2x-3)(2x+3)
(4y-7)(4x+7)
(8a+5)(5-8a)
(9c-1)(1+9c)
(10+3d)(3d-10)
(11x-6)(6+11x)
(2m-0,7)(2m+0,7)
(1,2-5y)(1,2+5y)
(8n+0,6)(8n-0,6)
(0,9p+2)(0,9p-2)
(1,1d-8)(8+1,1d)
(0,1a+1)(1-0,1a)
(0,7x-3y)(0,7x+3y)
(1,3m-4n)(1,3m+4n)
(5a+0,4d)(0,4d-5a)
(2,5p+6q)(6q-2,5p)
(8c-2,1d)(2,1d+8c)
(0,9x+2y)(0,9x-2y)
(1/4a-0,9b)(1/4a+0,9b)
(2/5m-1,5n)(2/5m+1,5n)
(3/7x-1/2y)(3/7x+1/2y)
(4/9c-9/10d)(9/10d+4/9c)
(1/3a+6/7b)(6/7b-1/3a)
(1/4a-0,9b)(1/4a+0,9b)