$\int\:\frac{\sqrt{x^2-16}}{x^3}dx$
$3x=126$
$3a+2+a$
$\int\frac{4}{5x-5}dx$
$cos\:\frac{19\pi}{36}\:cos\:\frac{7\pi}{36}+sin\:\frac{19\pi}{36}\:sin\:\frac{7\pi}{36}$
$\frac{dv}{dx}=2v^{\frac{2}{3}}$
$\lim_{x\to-\infty}\left(\frac{x^8-43}{x-5}\right)$
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