$x^4-7+\frac{16}{x^4}$
$4ax^2\cdot3x^2-6x+7$
$\sqrt{\left(4\right)^2-1}$
$\frac{m-4}{6}\:-\:\frac{m-2}{9}\:\le\frac{5}{18}$
$\left(x\:+\:3y\:-\:1\right)^2$
$\frac{x+1}{x+2}<-x-1$
$3.77\cdot0.625$
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