$\tan^3\left(\sqrt{sin\:\left(3x\:+4\right)^5}\right)$

$\left(2x^4+3x^3-16x-24\right)^2$

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

$\lim_{x\to-0.99}\frac{1-\cos\left(-0.99\right)}{-0.99}$

$\frac{9.8sinx}{cosx}=0$

$\left(7cy^3z^5\right)\left(u^2y^8z^2\right)^2\left(-c^3u^5\right)^3$

$x-3\le12$