$22y^2-49y+27$
$\lim_{x\to\infty}\left(\frac{x^2}{\left(\sqrt{x^2+4}\right)-2}\right)^{\left(\frac{\sin x}{x}\right)}$
$\int x^2e^xdt$
$\int x^3e^{-5}dx$
$x^2-2x-10=0$
$2x+8\cdot2$
$2x^2+4x-6=0$
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