Помогите пожалуйста)

Решите задачу:

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