$\frac { d y } { d x } = \frac { y } { x ^ { 2 } }$

$\int\left(4x^2+1\right)^2dx$

$\lim_{x\to0}\left(\frac{xsin\left(0\right)}{x^2}\right)$

$\int\frac{x^6}{\left(x^2-49\right)^{\left(\frac{9}{2}\right)}}dx$

$x^2+10x-39$

$\sqrt[3]{3ab^2}\left(\sqrt[3]{4a^4b^3}-\sqrt[3]{8a^5b^4}\right)$

$-4x^2+4x+7$