$7\log\left(x+1\right)-3\log\left(x^2-x-2\right)+5\log\left(x-2\right)$

$2^0+2^1+2^{-1\ }$

$\tan^2x-3\tan x+2$

$4x\:+\:4\:>\:x\:+\:16\:$

$\left(4^x\right)^2-26\left(4^x\right)+25=0$

$\:\left(-12\right)\left\{45+6\left(-12\right)-\left(-3\left(6\right)+9\right)\left[24-\left(-5\right)\left(-4\right)\right]\right\}$

$\frac{\left(4x+1\right)}{\left(x^2\left(x-2\right)\right)}$