$\lim_{x\to0}\:\frac{\left(e^2+2x-1\right)}{5x}$
$\int\left(\frac{1}{1+\tan\left(x\right)}\right)dx$
$\int_{-1}^{1-x^{2}}x^{2}dx$
$9a^2+24a+16$
$\int\frac{3tanx-4cos^2x}{cosx}dx$
$8z-4x+14$
$\lim_{x\to1}\left(\frac{2x^2-2}{x-1}\right)$
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