$\frac{54}{-9}$

$2\cdot\log\left(x-4\right)-\log\left(4\left(x-1\right)\right)=0$

$\int x^4in\left(x\right)dx$

$x-3=3$

$\int\:\frac{5-4x}{\left(2x-3\right)\left(x^2+1\right)}dx$

$\int\left(1+\sqrt[2]{\tan\left(x\right)}\right)^2\sec^2\left(x\right)dx$

$\frac{dy}{dx}\left(42y^2x^5\right)$