$5x^2+15x+1=0$
$\int\frac{8}{4+\left(x+3\right)^2}dx$
$6x^2-5x=6$
$\left(\frac{1}{1p}\right)^5$
$\left(-2^{2}\right)^{3}$
$\lim_{x\to\infty}\left(100-75e^{0.2x}\right)$
$\frac{1-x^2-x}{x}$
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