$x^2-5x-36<0$

$4.1+3.1+2.1+1.1+0.1+-0.9+-19$

$\left(x+3y+2z-4w\right)\left(x+3y+2z-4w\right)$

$\frac{dy}{dx^2}=x^2$

$\frac{\left(\sin^2\left(x\right)\cdot\sec\left(x\right)\right)}{2\tan\left(x\right)}$

$h^2\:+\:12h\:+\:27\:\:$

$\left(x^3+8\right):\left(x+2\right)+\left(x-4\right)^2$