$4\log\left(x\right)+2\log\left(y\right)-6\log\left(z\right)$

$4\tan^2x+12\tan x-27=0$

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

$\left(-7\right)\left(-4\right)-10$

$\frac{dy}{dx}+3y=2,\:y\left(0\right)=5$

$x^3-x^2+-x^{-2}-5^2$

$\left(-13\right)\left(37\right)$