$\int_1^{\infty}\left(\frac{6}{x^3}\right)dx$

$\left(10\sqrt{2}\right)\sqrt{2}$

$\int\frac{2x^2}{x^2+3}dx$

$-\left(-\left(-14\right)-\left(-20\right)-9\right)$

$\lim_{x\to0}\left(\frac{6\left(e^{2x}-1\right)}{2e^x-2}\right)$

$9\left(1+8s\right)+3s+8$

$\int_a^0\left(\frac{x}{\sqrt{x^2+9}}\right)dx$