$a^{x+1}\cdot a^m$
$\sqrt{x}+3-1$
$\left(x-50\right)\left(a-20\right)$
$\left(1-cosx\right)\left(1+cosx\right)=\sin\:^2\left(x\right)$
$\int\frac{5x^2}{x^3+2x}dx$
$\left(\sqrt[2]{3}x+2\right)^2$
$\lim_{x\to0}\left(\frac{3x+5}{2x+1}\right)$
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