$\int_0^{\infty}\left(\frac{2x+7}{x^2+7x+10}\right)dx$
$\frac{x^3+9x^2+6x+4}{x+1}$
$x^3-28x^2-\frac{61451}{25}x-\frac{316435}{25}$
$-9\left(2g-3\right)$
$\int_2^2100dx$
$\left(20x^2-y\right)^2$
$\lim_{x\to7}\left(\frac{49-x^2}{x-7}\right)$
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