$12-2x\ge-8x-12$

$\frac{1}{\left(\sqrt{\left(-6x^2-5x^4+43\right)}\right)}$

$\lim_{x\to3}\left(\frac{x-3}{x^2-5x+6}\right)$

$\int xcos^3\left(x^2\right)dx$

$\lim_{x\to\frac{\pi}{2}}\left(xsin\left(\frac{\pi}{x}\right)\right)$

$\frac{w^8}{w^7}\cdot\frac{w^5}{w^2}$

$x-6=18$