$2x^2+2x+1-1$
$\sqrt{3}\sec x-2=0$
$\left(a^x+b^{x-1}\right)^2$
$\int\frac{5x-4}{x^2-5x}dx$
$x+x^{-1}=2\:$
$\left(5x+14y^2\right)^2$
$\frac{2x^3}{\left(x-5\right)^2}$
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