$x^2+4\ge0$
$\frac{x^3-5x^2+17x-13}{x-1}$
$3+\frac{3}{5}_-\frac{1}{8}$
$\int\left(e^{cosx}\left(-sinx\right)\right)dx$
$\left(3x+9\right)\left(x+4\right)$
$49-x^2$
$18x+11x$
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