$22\cdot4>3\cdot22$

$x^2-6x+8\le0$

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

$\int_2^6\left(\frac{x}{\sqrt{5x^2+1}}\right)dx$

$\left(\frac{2}{5a^3}-3b\right)\left(3b+\frac{2}{5a^3}\right)$

$\lim_{x\to-\pi}\frac{\sin\left(x\right)}{\cos\left(x+\frac{\pi}{2}\right)}$

$7a-5a+a$