$\left|4\right|+\left|-7\right|$
$\lim_{x\to\infty}\left(\sqrt{9x^2-12x-3}-3x-1\right)$
$\sqrt{64x^2}$
$arccos\left(cos\left(x\right)\right)=\frac{2\pi}{3}$
$16a^2-8ab+b^2$
$\int_3^{\infty}\left(\frac{ln2x}{x}\right)dx$
$3x^2=15$
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