$\int\frac{e}{1+e^{-x}}\:dx$
$4+y=11$
$16x^2+64x+64$
$xdy=dx+dy$
$\sqrt[2]{\frac{54}{2}}$
$\frac{x^3+x-12x^2-42}{x-3}$
$\left(\sqrt{1+a^2}-\sqrt{1-a^2}\right)^2$
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