$\lim_{x\to\infty}\left(\frac{x^3+4-9x}{2x^3-7x^5-2x}\right)$
$\lim_{x\to0}\frac{5sin\left(9x^8\right)}{-4x}$
$\frac{5\left(2\sqrt{i^3}+3\right)}{i+10}$
$\lim_{x\to0}\left(\frac{4^x-4}{x^2-1}\right)$
$\int4x^2\sqrt{x^3+6}dx$
$4f\:+\:30$
$x2-8x+34=0$
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