$\lim_{x\to2}\left(x-2\right)^2\ln\left(x-2\right)$

$5\log_x\left(2\right)-\log_x\left(16\right)=2-\log_x\left(2\right)$

$a2\:-30+225$

$-618-9165-21$

$csc\left(x\right)sec\left(x\right)-csc\left(x\right)cos\left(x\right)$

$\log_{\frac{1}{5}}\left(x^2+1\right)^2=-2$

$\left(5m^{3}n-3m^{9}p+6m^{2}\right)\left(8mp^{3}\right)$