$\left(4a^{x+1}+7b^{x-2}\right)^2$
$\:\left(5x-\sqrt{7}y\right)^2$
$\frac{5}{37}+\frac{a}{27}$
$\left(x-2\right)^2x\:\left(x+1\right)$
$\int\frac{x\left[ln\left(1+x^2\right)^2\right]}{1+x^2}dx$
$\frac{4x^2+4x-3}{3x-2}$
$\lim_{x\to\infty}\left(\frac{cos\left(13x\right)}{13x}\right)$
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