$2x+6<3$
$5x-2+3y-8$
$\lim_{x\to\infty}\left(\frac{\sqrt{x^4+x}}{x^3}\right)$
$y+7=130$
$423.4\cdot25$
$\left(3+2\right)\cdot\sqrt{4}\cdot\left(2+1\right)^2$
$\left(3b^2-c\right)\left(9b^4+3b^2c+c^2\right)$
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