$-80-20-40-100$
$\int\frac{x^2+2x+1}{\left(x^2+3\right)^2}dx$
$\left(\frac{4x^2}{3}-8=20\right)$
$6\left(cos210+sen210\right)$
$\frac{dv}{dx}=\frac{1}{x}\left(\frac{1+v}{1-v}+v\right)$
$-7+1+n-7$
$f\left(x\right)=4\left(x-3\right)e-3$
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