$\frac{x^{12}+64}{x^4+4}$
$\lim_{x\to\infty}\left(\frac{x-2}{2x^2+3x-5}\right)$
$\lim_{x\to4}\left(-1+\sqrt{x}\right)$
$\ln10=\ln\left(x-6\right)+\ln\left(2\right)$
$\left(x^53ay^2\right)^2\left\{\right\}$
$-4p-\left(1-6p\right)$
$\sec^2=4sec^2$
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