$\lim_{x\to7}\left(\frac{x^2+3x-70}{x-7}\right)$
$\int7x^2e^{2x+1}dx$
$\lim_{x\to2}\left(\frac{4x^2-64}{x-4}\right)$
$2^3\:\cdot3^3\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:$
$\int\left(\frac{\left(x^7+1\right)}{\sqrt{x^8+8x}}\right)dx$
$\frac{35k^3}{5k^2}$
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