$21+24\cdot2$
$\left(1^2\right)^7$
$\lim_{x\to\infty}\left(\frac{x^3+2}{x^3+x+1}\right)^{x^2}$
$\int e^{-2\theta\:}\cdot\cos\left(\theta\:\right)d\theta\:$
$4-8x-5x^2$
$\left(\frac{n+1}{n}\right)^{2n}$
$\sqrt[6]{15a^3x^2},\:\sqrt{2a},\sqrt[3]{3a^2b}$
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