$\left(-4\right)\:x\:\left(9\right)$

$\log\left(x-15\right)=2-\log\left(x\right)$

$\left(\frac{x^6}{x^5}\right)^3$

$\left(x-1\right)\left(x+2\right)\left(x-3\right)\left(x+3\right)$

$m+5m^2+2m^2-3m+4m-3m^2$

$0.5\log_{10}\left(25\right)-2\log_{10}\left(3\right)+\log_{10}\left(18\right)$

$p\left(p^{-4}\right)^{-7}$