$\lim_{x\to1}\left(x+e^x\right)^2$
$-x\left(x+7\right)$
$5x^2+10x+3=0$
$\int_0^{\frac{1}{2}}\frac{8x}{\left(2x+1\right)\left(4x^2+1\right)}dx$
$-9f-f$
$\frac{x^3+8}{x+2}$
$3x^3+12x^2+12x$
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