$\left(1+\frac{2i}{n}\right)^4$
$3x^5-18x^2+27x$
$\left(h^3+f^2g^5\right)^2$
$\int\frac{e^t}{e^t+4}dt$
$x-2-x+5$
$w^2+10w+10$
$\lim_{x\to0}\left(\frac{4}{x^2}-\frac{2}{1-e^x}\right)$
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