$\int12\cot^{-1}\left(x\right)dx$
$\frac{343x^3-8y^3}{7x+2y}$
$5x-8<107$
$2m^4n-6mn$
$\sin^2x+1=\cos x$
$41-17-340+-257$
$\int\frac{x^2+3}{x^3-6x^2-x+6}dx$
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