$\int\frac{7x^2}{\left(x^2+169\right)^2}dx$

$-6\:\frac{1}{3\:}\:-\frac{1}{2}\left(\frac{1}{2\:}\:+y\right)$

$6y^312xy^2$

$990^2$

$\int\left(\frac{\ln\left(\sqrt{x}\right)}{x^2}\right)dx$

$\lim_{x\to0}\left(\frac{sin\left(x\right)}{x}\right)^{\left(\frac{1}{x^'}\right)}$

$\frac{d}{dx}x+y+2xy=10$