$5x+6>3x-12$

$sec\left(x\right)\left(1-sin^2\left(x\right)\right)$

$u=\frac{\left(a^{3}b\right)^{-2}\cdot\left(ab^{-2}\right)^{3}}{\left(ab\right)^{-1}}:\left(\frac{2a}{b}\right)^{-2}$

$\left(x+3\right)\cdot\left(y+1\right)\cdot\left(x+2\right)$

$34^327x^3$

$\frac{d}{dx}\left(3y^4-y^2\left(y^2-4\right)\right)$

$\frac{dy}{dx}=\frac{8-4x}{9\left(y-1\right)}$