$-6x+13\le8x+4$

$\left(-x^2+11x-28\right)^2$

$5\log_x+2\log_y-3\log_z$

$2x^2+2x>-4$

$\lim_{x\to\infty}\left(\frac{\sqrt{x^2+1}}{\sqrt[3]{x^3-3}}\right)$

$\left(\sqrt{10}-3\right)\left(\sqrt{10}+3\right)$

$\left(+2\right)\cdot\left(+4\right)\cdot\left(-8\right)\cdot\left(+7\right)$