$\left(-1\right)^{49}$
$\int\left(9x-3x^2+7\right)dx$
$\lim_{x\to7}\left(\frac{x^2-8x+1}{x-7}\right)$
$12x<20x+36$
$\frac{x^2-16x+63}{49-x^2}$
$20y=24y'$
$\left(2x^5-y^2\right)^2$
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