$2xln\left(1+\frac{1}{x}\right)$
$4x+3y-2x+7y$
$\frac{-81x^3y^5}{9xy^6}$
$2^2+2^2+2^2\left(5\right)$
$\int\left(1-x\right)\sqrt{10+3x}dx$
$\lim_{x\to\frac{3\pi}{4}}\left(\frac{cosx}{1-senx}\right)$
$\sin\left(\frac{5}{7}\right)\cos\left(\frac{2\sqrt{6}}{7}\right)$
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