$4x^2-4x+40$
$\int\frac{sen2x}{cosx}dx$
$\lim_{x\to\infty}\left(\frac{x+5}{x+3}\right)^{x+3}$
$64x^2+48+9$
$\frac{x^4}{8-x^3}$
$5x^2+3x=1$
$-4x^2-\left(x+y\right)$
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