$\log\left(x\right)+\log\left(x-2\right)=\log\left(5\right)$

$\frac{2x-1}{x-1}=1$

$\left(\frac{x^2u^{-1}}{2z^2}\right)^2\left(uz^2\right)$

$\int\:x^{11}sin\left(x^{12}\right)dx$

$z^2-15z+56.25$

$\frac{5}{6}\left(3-x\right)-\frac{1}{4}\left(x-4\right)\ge\frac{1}{3}\left(2x-3\right)-x$

$\left(-8\right)\cdot\left(+2\right)-\left(+4\right)-\left[\left(-5\right)+\left(+2\right)\right]$