$\int\frac{x+3}{x^2+x+1}dx$
$25x^2+10x-81$
$\sin\left(\frac{5\pi}{2}+x\right)=\cos\left(x\right)$
$49x^1^6-16$
$\lim_{x\to8}\left(\frac{x^3+512}{x^2-64}\right)$
$dy=\left(\csc\left(x\right)-y\cot\left(x\right)\right)dx$
$\sin\left(2a\right)=1$
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