Exponentiation, Subtraction and Multiplication

$(2^4-4^2)(5^7-7^5) = (16-16)(5^7-7^5) = 0(5^7-7^5) = \boxed{0}$

$2^4 - 4^2$ $=$ $16 - 16$ $=0$ , any number multiplied by $0$ is $0$ , therefore the answer is $0$ .

Here, $2^4 -4^2 =0$ ..So, Finding out the value of 1st part factor $2^4 -4^2$ is to find out the product.. Answer is \boxed{\color\red{0}}

$2^4 - 4^2 = 0$

$\implies (0)(5^7-7^5) = \boxed{0}$