$\left(5t^2+2n\right)^2$
$x-6\le187x$
$10\:\frac{1}{4}\:-\:-2\:\frac{1}{4}$
$\left(y^2-1\right)\left(y^2+1\right)$
$-\frac{2}{3}x\:+\:9\le\frac{5}{6}x-\frac{1}{2}$
$\left(84m^3-16y^2\right)\left(99m^3+19y^2\right)$
$\lim_{x\to\infty}\left(\frac{2x+5}{2\sqrt{x^2+5x+1}}-2\right)$
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