$x^2+14x+49=0$
$\frac{x^4+5x^3+3x^2}{x}$
$16.99\sqrt{\frac{2}{3}}$
$\int\frac{1}{3x^2-x^4}dx$
$\frac{\sin\left(x\right)}{1+\sec\left(x\right)}-\frac{sen}{1-\sec\left(x\right)}=2\cot\left(x\right)$
$4.5\left(2.25\right)^5$
$\lim_{x\to0}\left(\frac{x^2-4x-3}{x^2-1}\right)$
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