5^(2*x+7)-25^(2*x)
What do you want done with this - I have factorised it.
\(5^{2x+7}-25^{2x}\\ =5^{2x+7}-(5^2)^{2x}\\ =5^7*5^{2x}-(5^{2x})(5^{2x})\\ =5^{2x}(5^7-5^{2x})\\ =25^{x}(5^7-25^{x})\\\)
