Решите пожалуйста;3(с логарифмами)

[latex] \frac{3log_515*log_59-2log_5^215-log_5^29}{log_59-log_515}= \frac{3log_515*log_59-log_5^215-log_5^215-log_5^29}{log_59-log_515}=[/latex][latex]=\frac{log_515*log_59-log_5^215-(log_5^215+log_5^29-2log_515*log_59) }{log_59-log_515}=[/latex][latex]=\frac{log_515(log_59-log_515)-(log_29-log_515)^2 }{log_59-log_515}=\frac{(log_59-log_515)(log_515-(log_29-log_515)) }{log_59-log_515}=[/latex][latex]=log_515-log_29+log_515=2log_515-log_59=2(log_53+1)-2log_53=[/latex][latex]=2log_53+2-2log_53=2[/latex]