$\int\sqrt{x-1}-\left(-1+x\right)dx$
$\int x\sqrt{2-x}dx$
$\lim_{x\to\infty}\left(\frac{\sqrt{x+7}-\sqrt{11-x}}{2x-4}\right)$
$x^5+5x^3+5x$
$\left(x^3-4y\right)^4$
$a^2-41a+400$
$49m^2-81n^2$
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