$\frac{x+2}{x+1}<2$

$\csc\left(x\right)+\cot\left(x\right)^2=1$

$3r\:\ge\:27$

$y=\left(x^3-2x\right)^2y$

$\lim_{x\to\infty}\frac{\ln\left(x\right)}{3x^3}$

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

$\frac{1}{\tan\left(x\right)}+\cos\left(x\right)=\frac{\cos\left(x\right)^2}{\tan\left(x\right)-\tan\left(x\right)\sin\left(x\right)}$