$\left(+2\right)-\left(+8\right)+\left(+1\right)$
$4x^2+88+121$
$\lim_{x\to1}\left(\frac{x^3-3x+2}{1-\sqrt{x}}\right)$
$x^{2+24x+144}$
$+\:3\:-\:5\:+\:2\:-\:10\:+\:4\:-\:7\:+\:1$
$y.x.dy-\sqrt{1+y^2}.dx=0$
$187.950+389.000$
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