$y=\sqrt{\frac{x-2}{x^4+2}}$
$\int\frac{1}{4x^2+49}dx$
$-5y^2-22y-8$
$\lim_{x\to0}\left(\frac{e^x-e^{-x}-2\sin x}{x^2}\right)$
$\int x^6fndx$
$-\int\frac{sen\:\left(x\right)}{1+cos\left(x\right)}dx$
$\left(\sqrt{5-3}\right)\left(\sqrt{5-3}\right)$
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