1) (m+4)*(m-4) 2) (5n-p)*(5n+p) 3) (12a+7b)*(12a-7b) 4) (10x^2-y^2)*(10x^4+y^2)

1) (m + 4)*(m - 4) = m^2 - 4 ^2 = m^2 - 4 * 4 = m^2 - 16; 2) (5n - p) * (5n + p) = (5n)^2 - p^2 = 25n^2 - p^2; 3) (12a + 7b)*(12a - 7b) = (12а)^2 - (7b )^2 = 144а^2 - 49 b ^2; 4) (10x^2 - y^2)*(10x^2 + y^2) = (10x^2)^2 - (y^2)^2 = 100x^4 - y^4. Ответ: 1) m^2 - 16; 2) 25n^2 - p^2; 3) 144а^2 - 49 b ^2; 4) 100x^4 - y^4.