$\left(z^2+1\right)^2$
$\lim_{x\to0}\left(\frac{sin5x}{sim3x}\right)$
$\frac{27x^{12}-1}{\sqrt{x}^2-1}$
$2x\ge6$
$x\left(x-3\right)-x\le\left(x-1\right)\left(x-2\right)-3$
$22+1+7$
$\left(2x-1\right)^2-\left(y-2\right)^2$
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