$\frac{y}{3}-9\le2y-4$
$n^2-16+64$
$7x^2+x^2$
$12-\left(-5-33\right)+\left(-4+89\right)-\left(-30\right)$
$6-3\left|x-2\left(x-y\right)\right|$
$-11k+13-g+5g+7+3k$
$\lim_{x\to\infty}\left(\frac{x^2-4}{x^2-x}\right)$
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